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SEQUENCE LOW VOLTAGE DC POWER AND AMPLIFIERS Eliminate Audio Pops During System Power-Up and Power-Down
SEQUENCE LOW VOLTAGE DC POWER AND AMPLIFIERS
Eliminate Audio Pops During System Power-Up and Power-Down
AN-2173
Description:
The RU‑SQ6A Sequencing Controller provides complete power distribution management in this sound system. Sequencing the power ON and OFF of the system avoids annoying and sometimes damaging thumps and pops by turning power amplifiers ON last and OFF first. In systems using large power amplifiers, the sequencing of power can also avoid high inrush currents during power up. The RU‑SQ6A features outputs for six sequential steps. The Timing Interval between steps may be adjusted between 1 and 10 seconds. Each step is provided with both Open Collector and SPST dry contact outputs. In this application Open Collector outputs are used to activate the TX‑PD8X Switching Power Supply Distributors that power numerous other RDL products while dry contact closures are used to activate OEM low voltage controllable mains power outlets. Remote ON/OFF control of the RU‑SQ6A is provided by a D‑RT2 Remote Control Selector. Visual indication of the ON/OFF status is provided on the remote control.

FIXED MIXING OF PODIUM MIC AND LINE INPUTS Mixing a Condenser Microphone and Stereo Source to a Mono Line
FIXED MIXING OF PODIUM MIC AND LINE INPUTS
Mixing a Condenser Microphone and Stereo Source to a Mono Line
AN-2202
Description:
The sound system in this room is equipped with a mono balanced input from the floor box. When the podium is in use, the presenter uses the condenser microphone and also uses an audio player (or laptop computer) in the podium. The ST‑MPA48 provides the P48 phantom voltage for the condenser microphone. The three inputs on the ST‑UMX3 Universal Audio Mixer mix the microphone with the left and right unbalanced audio player outputs. The ST‑UMX3 provides a balanced mono mic‑level or line‑level (switch‑selectable) feed to the sound system input. The small size of the ST‑UMX3 and the ST‑MPA48 allows them to be installed in the podium or the floor box. The ST‑UMX3 3X1 Universal Audio Mixer is used to combine signals of different level, impedance or balanced/unbalanced configuration. Each input and the output is switch‑selectable for mic or line level. Single‑turn trimmers are provided for the gain adjustment of each input. The ST‑MPA48 contains two identical phantom power circuits and a common power supply input. If only one mic input is to be converted for phantom operation, only one circuit needs to be used. Phantom voltage is not present on the output terminals.

BASIC TWO ROOM COMBINING SYSTEM Room Combining System with Background Music and Volume Control
BASIC TWO ROOM COMBINING SYSTEM
Room Combining System with Background Music and Volume Control
AN-2059
Description:
This system is set up in a basic two room combining configuration. The rooms can be separated/joined by a movable wall. The room audio can be combined and uncombined at the main control unit in the rack. Each room is equipped with a local audio input wall plate that accepts both mic‑level and line‑level audio. A room control plate allows volume control and the selection of local sources or background music. The second room in this system is equipped with an additional volume control at the opposite end of the room. When the rooms are separated the local inputs are associated with that room only. When the rooms are combined, the local audio from each room is combined, creating one large room. This example uses an FP‑PA20A 20 Watt 70 V amplifier for each room. Facility‑wide paging is available through the rack mounted system controller. The RCX‑5C can be used for room combining systems of two to five rooms.

HOTEL ROOM COMPLETE ENHANCED AUDIO SYSTEM Private Bedside TV Audio and Adjustable Bathroom TV Audio Without Disturbing Partner
HOTEL ROOM COMPLETE ENHANCED AUDIO SYSTEM
Private Bedside TV Audio and Adjustable Bathroom TV Audio Without Disturbing Partner
AN-2154
Description:
This installation enhances the hotel experience when one guest wishes to watch and listen to the TV while the guest’s partner does not. Either guest can plug in personal headphones to the bedside TP‑HA1A Headphone Amplifier, adjust the listening level and enjoy the video program or movie. With the TV set to mute its internal speakers, each guest enjoys their environment (video/audio program or silence). In addition, this installation completes the hotel experience by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A amplifier in the wall allows the guest to adjust the audio as loud as necessary, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV is set to mute its internal speakers, TV audio is only heard in the bathroom. This is ideal if one guest wished to sleep while the other guest is spending time in the bathroom.

FORMAT-A SOURCE SELECTOR & IN-WALL AMPLIFIER Distribute Three Audio Sources to Multiple Locations Over UTP Cable
FORMAT-A SOURCE SELECTOR & IN-WALL AMPLIFIER
Distribute Three Audio Sources to Multiple Locations Over UTP Cable
AN-2220
Description:
Three styles of music are distributed to various rooms in this facility over CAT 5 cable by an RU‑TPS4A Format‑A Active Sender / Distributor. A D Series‑TPRX3A Source Selector and D Series‑PA3 Audio Amplifier installed in each room allow the occupants to listen to any of the three types of music provided or to listen to their own program material simply by plugging their MP3 player into the front‑panel input on the D‑PA3 amplifier. The front‑panel local input overrides the distributed audio.

HOTEL BATHROOM AUDIO Remote Level Control and Source Selection
HOTEL BATHROOM AUDIO
Remote Level Control and Source Selection
AN-2068
Description:
The compact size of RDL modules allows the creation of a system to provide high quality sound in a nearby room without dedicating space for electronic equipment. The example pictured allows remote level control and source selection using equipment which can be placed in electrical boxes or tucked into a TV armoire.

The TX‑J2 provides a balanced mono signal from the stereo unbalanced sources used in this system. The ST‑SSR1 allows switching between the satellite radio receiver and the television audio in the adjacent room. It is controlled by the RC2‑STS. The ST‑VCA3 adjusts audio level set by the RLC10KS mounted in the wall. The power amplifier is an ST‑PA18 which incorporates an on‑board compressor/limiter. The ST‑PA18 can provide up to 18 Watts RMS to power an 8 Ohm speaker. The completed system projects a professional, aesthetically pleasing image for years of reliable operation.

This example uses fixed output levels from the two sources. The bathroom audio level is controlled by the RLC10KS remote control.

MULTIPLE USER LEVEL CONTROLS FOR SINGLE ZONE Multiple Control Points Provided by Rotary Optical Encoder Remote Controls with Muting
MULTIPLE USER LEVEL CONTROLS FOR SINGLE ZONE
Multiple Control Points Provided by Rotary Optical Encoder Remote Controls with Muting
AN-2169
Description:
This basic sound system provides two D‑RLC10M Remote Level Controls with Muting for end users to adjust the volume from two different locations. The master D‑RLC10M creates the 0 to 10 Vdc control voltage that sets the gain of the ST‑VCA3 Voltage Controlled Amplifier. The ST‑VCA3 adjusts the audio level feeding the system audio power amplifier. The slave D‑RLC10M sends up/down and muting commands to the master D‑RLC10M. An end user can turn the volume up or down, and mute or unmute the system from either remote control. Pressing the MUTE button on either D‑RLC10M shuts off the audio signal. Audio is restored to the previously‑set level when the MUTE function is released by pressing either MUTE button again. These controls, one set to MASTER and the other to SLAVE, are shown connected to an ST‑VCA3 Voltage Controlled Amplifier but can be used with any other RDL VCA or OEM product requiring a 0 to 10 Vdc ramp for level control. As many as ten D‑RLC10M Remote Controls may be connected together in one zone. These remote controls are also available in black (DB‑RLC10M) and stainless steel (DS‑RLC10M).

AUDIO DISTRIBUTION OVER TWISTED PAIR Multi-Zone Paging w/BGM and Message Repeater
AUDIO DISTRIBUTION OVER TWISTED PAIR
Multi-Zone Paging w/BGM and Message Repeater
AN-2144
Description:

An RDL FP‑MR2 Message Repeater plays back pre‑recorded messages and provides ducking or muting of the BGM source during message playback. The message repeater can be programmed to repeat automatically or may be triggered manually. Two dynamic or condenser microphones are pre‑amplified to line‑level by an RDL HR‑MP2 Dual Microphone Preamplifier. All three audio sources (BGM/Message Repeater, Paging Mic 1, Paging Mic 2) are distributed to each of the three floors of an office or retail building over readily available CAT5 cabling utilizing an RDL RU‑TPS4A Active Sender/Distributor and three TX‑TPR3A Active Receivers (one per floor). Each Active Receiver provides line‑level audio to an RDL HD‑MA35A Mixer Amplifier. The BGM/Message Repeater signal connects to Input 2 of the mixer amplifier on each floor. Input 1 of each mixer amplifier is fed from the Receiver output that corresponds with the Paging Mic (1 or 2) that will be used to page on that floor. Input 1 is set to "duck" the other amplifier input(s) so paging will take priority.

The RDL Format‑A twisted pair products provide flexibility and expandability for this multi‑zone paging system. Additional floors may be added using additional receiving modules and amplifiers./


DISTRIBUTED OUTDOOR SOUND User Audio Input Automatically Overrides House Audio in Local Zone
DISTRIBUTED OUTDOOR SOUND
User Audio Input Automatically Overrides House Audio in Local Zone
AN-2032
Description:
An unbalanced stereo audio signal from the house audio system is summed and converted to a balanced mono signal using the TX‑J2 Unbalanced Input Transformer. The ST‑ACR Audio Controlled Relay normally connects the house audio source to the FP‑PA20A 20 Watt Audio Power Amplifier which feeds 70 Volt outdoor loudspeakers in the patio seating area. The patio is equipped with a DS‑CIJ3 Consumer Input Jack plate to connect an unbalanced stereo audio source (RCA jacks or Mini‑jack, MP3 shown). When a source is connected and playing audio, the ST‑ACR2 detects the audio and switches the amplifier input from house audio to the connected source. The patio speakers will distribute the locally connected source as long as it is playing. When the local source is finished, the ST‑ACR2 switches back to the house audio. An FP‑PA20B 20 Watt 25 Volt Power Amplifier may be used in place of the FP‑PA20A if a 25 Volt system is desired.

STEREO REMOTE AUDIO LEVEL CONTROL Studio Quality Volume Adjustment for Professional and Consumer Applications
STEREO REMOTE AUDIO LEVEL CONTROL
Studio Quality Volume Adjustment for Professional and Consumer Applications
AN-2158
Description:
The RU‑VCA2A Two Channel Digitally Controlled Attenuator and RLC10K Remote Level Control are used to increase and decrease the level of the Stereo Sound source feeding the amplifiers. The RU‑VCA2A offers clickless level adjustment, accurate tracking and outstanding wide‑band, low‑noise studio quality performance. It can be controlled remotely by a variety of RDL or third‑party controls and/or locally via front‑panel pushbuttons. Each audio input and output may be configured balanced or unbalanced. Multiple RU‑VCA2As and/or RU‑VCA6As may be linked together for single‑point level control of 7.1, 10.2 or 22.2 surround sound systems.

GATED MIC PREAMPLIFIER DETECTS SIGNAL PRESENCE Preamp Suppresses Ambient Noise While Idle and Provides Visual Indication of Speech Activity
GATED MIC PREAMPLIFIER DETECTS SIGNAL PRESENCE
Preamp Suppresses Ambient Noise While Idle and Provides Visual Indication of Speech Activity
AN-2176
Description:
The ST‑GSP1 Gated‑Speech Preamplifier produces gated line‑level audio from a balanced dynamic or condenser microphone. The preamp output remains off when no one is speaking into the microphone, thereby not picking up and amplifying ambient room noise. The moment someone speaks into the microphone, the output of the ST‑GSP1 turns on, feeding line‑level audio to the sound system. The SLAVE output terminal is used to activate the ST‑LCR1 Logic Controlled Relay which provides a contact closure to turn on a visual indicator. The indicator lamp confirms to the person speaking that the microphone is active. Additional contacts on the ST‑LCR1 are available to turn on other indicators or recording devices. The ST‑GSP1 detection threshold is adjustable. Muting occurs 2 seconds after the audio level drops below the preset threshold. In circumstances where a longer delay time is desired, an external capacitor may be connected to extend the delay. The ST‑GSP1 line‑level output may be configured balanced or unbalanced to feed a variety of audio inputs.

HOTEL GUEST ROOM BEDSIDE AUDIO SYSTEM Listen to Private TV Audio Using Headphones Without Disturbing Partner
HOTEL GUEST ROOM BEDSIDE AUDIO SYSTEM
Listen to Private TV Audio Using Headphones Without Disturbing Partner
AN-2152
Description:
This installation enhances the hotel experience when one guest wishes to watch and listen to the TV while the guest’s partner does not. Either guest can plug in personal headphones to the bedside TP‑HA1A Headphone Amplifier, adjust the listening level and enjoy the video program or movie. With the TV set to mute its internal speakers, each guest enjoys their environment (video/audio program or silence).

NETWORKED AUDIO - ADDING NEW CHANNELS BGM and Paging Audio Transmitted Between Buildings Over Existing Network
NETWORKED AUDIO - ADDING NEW CHANNELS
BGM and Paging Audio Transmitted Between Buildings Over Existing Network
AN-2228
Description:
Dante™ networked audio is ideal for audio systems with large channel counts and is equally beneficial in much smaller systems. Cost savings can result from utilizing Dante to transport one to four channels of audio over an existing Local Area Network which would otherwise require the installation of dedicated audio cable between buildings in a school, hospital, church, office complex or factory. This diagram shows background music and a paging microphone sent via Format‑A directly to a local Mixer‑Amplifier in the main building. The Format‑A cabling also sends these sources to the RU‑FNP Format‑A to Network Interface which converts the two sources to two Dante network channels. The signals travel through the network to the satellite building(s) where they are converted back to audio by the FP‑NML2 Network to Mic/Line Interface to feed the BGM and Paging inputs of a Mixer‑Amplifier.

POWER 3 ACTIVE SPEAKERS ON FORMAT-A CABLE RUN Power Inserter / Signal Breakout Module Permits Home Run Cabling From a Dante™ Network
POWER 3 ACTIVE SPEAKERS ON FORMAT-A CABLE RUN
Power Inserter / Signal Breakout Module Permits Home Run Cabling From a Dante™ Network
AN-2234
Description:
Each Format‑A active loudspeaker requires 100 mA of supply current. A TX‑TP4PW Power Inserter / Signal Breakout module provides up to 200 mA to each D‑PSP1A active loudspeaker. The TX‑TP4PW Power Inserter / Signal Breakout module is used to receive Pairs A, B and C from a single cable run connected to the RJ45 output of the RU‑BNF Format‑A Bi‑Directional Network Interface. The RU‑BNF converts 3 Dante sources to Format‑A. Those sources on pairs A, B and C are all passed through to each home run cable that connects to the RJ45 input of each D‑PSP1A Format‑A loudspeaker. A rear‑panel switch set during installation selects which of the three audio sources is amplified by the powered speaker. All D‑PSP1A loudspeakers may be set to the same pair if desired. All the Format‑A modules are powered by the external supply connected to the TX‑TP4PW. This setup can be replicated for the remaining two Format‑A outputs from the RU‑BNF. Additionally, the Format‑A input on the RU‑BNF may be used to convert three Format‑A sources onto the Dante network (not shown).

BASIC TWO ROOM COMBINING SYSTEM School Cafetorium Room Combining System with Automatic Audio Leveling Compression
BASIC TWO ROOM COMBINING SYSTEM
School Cafetorium Room Combining System with Automatic Audio Leveling Compression
AN-2124
Description:
This cafetorium can be used as one large room or as two smaller rooms formed by movable wall partitions. Each room has one mic and one mono or stereo line‑level input connection through a DS‑J3 input plate. EZ‑MCP1 Microphone Compressors provide consistent level and overload protection on the mic inputs. ST‑CL2 Compressor/Limiters provide the same benefits for the line inputs. The DS‑RCX2 Room Controls provide volume control in each room and allow selection of a common external source (typically background music). The RCX‑5C controls the audio system configuration, separating or combining the inputs and amplified audio to the speakers according to the room usage (one large room or two smaller rooms). The paging input overrides the audio in the entire cafetorium. Note: The RCX‑5C can be used for room combinations from two to five rooms. An HD‑PA35UA Audio Power Amplifier is used for each zone in this system to feed 70 Volt speakers. The HD‑PA35UA has an automatic sleep mode that shuts off the power amplifier when it is not in use. This offers significant energy savings for systems not operated by technical staff.

PATIO AUDIO SYSTEM House Audio System with MP3 Player and 4 Outdoor Rock Loudspeakers
PATIO AUDIO SYSTEM
House Audio System with MP3 Player and 4 Outdoor Rock Loudspeakers
AN-2026
Description:
A stereo unbalanced audio signal from the house audio system is summed and converted to a balanced mono signal using the TX‑J2 Unbalanced Input Transformer. The patio is equipped with a DS‑CIJ3 Consumer Input Jack Decora® plate that provides connectivity for an MP3 music player or other stereo audio source. Source selection is controlled by the house audio system and volume is controlled using the house audio system and/or the MP3 player, if it’s in use. An RDL FP‑PA20A 20 Watt 70 Volt Audio Power Amplifier powers four 70 Volt outdoor rock speakers in a patio seating area. Each speaker is tapped at 5 Watts, for a total of 20 Watts. Using a 70 Volt system allows for the use of smaller cable sizes which reduce system costs and simplify the installation. An RDL FP‑PA20B 20 Watt 25 Volt Audio Power Amplifier may be used in place of the FP‑PA20A if a 25 Volt system is desired.

POWERING MULTIPLE STICK-ONS FROM SINGLE SUPPLY Distributed dc Power From Current-Limited Switching Power Supply
POWERING MULTIPLE STICK-ONS FROM SINGLE SUPPLY
Distributed dc Power From Current-Limited Switching Power Supply
AN-2193
Description:
The low current consumption of STICK‑ON modules allows multiple modules to be powered from a single supply. The ST‑PD5U distributes power from any RDL current‑limited switching power supply to up to five modules with a total current requirement of 2 amperes or less. RDL 24 Vdc switching power supplies (purchased separately) are available with current ratings of 500 mA, 1 A and 2 A. All meet ENERGY STAR Level V standards.

POWERING MULTIPLE SYSTEMS FROM ONE SUPPLY Remote ON/OFF Control Allows Users to Turn Systems On and Off
POWERING MULTIPLE SYSTEMS FROM ONE SUPPLY
Remote ON/OFF Control Allows Users to Turn Systems On and Off
AN-2172
Description:
The four separate sound systems are comprised of modules in the Equipment Rack powered by a single 24 Vdc power supply. Good engineering practice requires that the power wiring to each component originate at the power supply output. In this installation, the TX‑PD8X Switching Power Supply Distributor serves as the power source for the eight modules comprising the four systems. The TX‑PD8X is equipped with remote control terminals that provide for turning its eight outputs on or off. The wall‑mounted D‑RT2 Remote Control Selector allows users to control the TX‑PD8X, thereby turning the four systems on or off. Visual indication of the ON/OFF status is provided on the remote control. The TX‑PD8X is capable of distributing up to 2 Amps of 24 Vdc power to a maximum of eight dc power jacks from the corresponding RDL current‑limited switching power supply. A smaller RDL power supply may be used for systems with less total module current.

DISTRIBUTED AUDIO FOR MASSAGE PARLOR SourceFlex System Provides Individual Room Source Selection and Volume Control
DISTRIBUTED AUDIO FOR MASSAGE PARLOR
SourceFlex System Provides Individual Room Source Selection and Volume Control
AN-2219
Description:
The SourceFlex audio system provides individual audio source selection and volume control in each area. An external power amplifier powers the speakers in the larger waiting room. The massage room speakers are powered by room amplifiers built in to the SourceFlex Decora‑style wall controls. Three sources are shown connected to the SAS‑8i rackmounted controller (CD player, Satellite receiver, MP3 player) which accommodates up to 8 selectable sources plus a paging input. Stereo sources are converted to mono using RDL TX‑J2 modules. A paging microphone is preamplified using an RDL STM‑1 to feed the SAS‑8i line‑level paging input. Clients select the source and set the volume on a D‑SFRC8 wall control with integrated 3.5 W RMS power amplifier. The receptionist selects the source and adjusts the volume in the larger lobby area. A D‑SFRC8L wall control is used to choose the audio source. It provides a line‑level output to an external RDL RU‑PA40D audio amplifier with integral VCA. An RDL D‑RLC10 rotary encoder‑type VCA control adjusts the lobby audio level. The reception station is equipped with a push‑to‑talk button used to page all the listening areas. The SAS‑8i Controller powers up to 4 listening stations, and provides connections to multiple SAS‑8C 8‑station expansion chassis. There is no practical limit to the number of possible listening zones.

HOTEL ROOM COMPLETE ENHANCED AUDIO SYSTEM Private Bedside TV Audio and Adjustable Bathroom TV Audio Without Disturbing Partner
HOTEL ROOM COMPLETE ENHANCED AUDIO SYSTEM
Private Bedside TV Audio and Adjustable Bathroom TV Audio Without Disturbing Partner
AN-2154
Description:
This installation enhances the hotel experience when one guest wishes to watch and listen to the TV while the guest’s partner does not. Either guest can plug in personal headphones to the bedside TP‑HA1A Headphone Amplifier, adjust the listening level and enjoy the video program or movie. With the TV set to mute its internal speakers, each guest enjoys their environment (video/audio program or silence). In addition, this installation completes the hotel experience by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A amplifier in the wall allows the guest to adjust the audio as loud as necessary, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV is set to mute its internal speakers, TV audio is only heard in the bathroom. This is ideal if one guest wished to sleep while the other guest is spending time in the bathroom.

HOTEL GUEST ROOM BEDSIDE AUDIO SYSTEM Listen to Private TV Audio Using Headphones Without Disturbing Partner
HOTEL GUEST ROOM BEDSIDE AUDIO SYSTEM
Listen to Private TV Audio Using Headphones Without Disturbing Partner
AN-2152
Description:
This installation enhances the hotel experience when one guest wishes to watch and listen to the TV while the guest’s partner does not. Either guest can plug in personal headphones to the bedside TP‑HA1A Headphone Amplifier, adjust the listening level and enjoy the video program or movie. With the TV set to mute its internal speakers, each guest enjoys their environment (video/audio program or silence).

TWO ZONE PAGING SYSTEM Remote Switch at Paging Station Controls Solid-State Audio Routing to Proper Paging Zone
TWO ZONE PAGING SYSTEM
Remote Switch at Paging Station Controls Solid-State Audio Routing to Proper Paging Zone
AN-2192
Description:
The operator of the paging station can selectively page in either zone. The STM‑2X Switchable Low Noise Microphone Preamplifier amplifies the paging mic to line level. The preamp output is active only while the operator presses the mic push‑to‑talk button. The ST‑RX2 Audio Routing Switcher routes the line‑level audio signal to one of the two amplifiers. The NORMAL output feeds the Zone 1 amplifier; the SELECT output feeds Zone 2. The Audio Routing Switch at the operator’s station controls the ST‑RX2 TRIG terminal. When the ST‑RX2 TRIG control terminal is not connected to ground, audio is fed to the NORMAL output and the SELECT output is turned off. When the TRIG control terminal is grounded, the input audio is routed to the SELECT output and the NORMAL output is muted.

FIXED MIXING OF PODIUM MIC AND LINE INPUTS Mixing a Microphone and Stereo Source to a Single Line
FIXED MIXING OF PODIUM MIC AND LINE INPUTS
Mixing a Microphone and Stereo Source to a Single Line
AN-2198
Description:
The sound system in this room is equipped with a mono balanced input from the floor box. When the podium is in use, the presenter uses the microphone and also uses an audio player or laptop computer. The ST‑UMX3 Universal Audio Mixer is installed to mix signals from a single dynamic microphone and the unbalanced stereo source located in the podium to a balanced mono mic‑level or line‑level (switch‑selectable) feed to the sound system input. The small size of the ST‑UMX3 allows it to be installed in the podium or the floor box. The ST‑UMX3 3X1 Universal Audio Mixer is used to combine signals of different level, impedance or balanced/unbalanced configuration. Each input and the output is switch‑selectable for mic or line level. Single‑turn trimmers are provided for the gain adjustment of each input.

NETWORKED AUDIO - MULTIPURPOSE AV CART Scalable Audio Solution Over A Dante™-Enabled Audio Network
NETWORKED AUDIO - MULTIPURPOSE AV CART
Scalable Audio Solution Over A Dante™-Enabled Audio Network
AN-2238
Description:
The sound system in this multipurpose facility is designed to offer the end user a scalable audio solution for a variety of functions. The system is based on a centralized Dante‑enabled DSP and a number of portable systems each of which includes active loudspeakers and a cart‑mounted RU‑MLB4 Mic/Line Bi‑Directional Dante Network Interface as shown above. Each RU‑MLB4 is assigned a unique STATIC IP address which is recognized by the DSP from any location in the building. The RU‑MLB4 provides up to four mic or line audio inputs. Depending on the size and nature of the event additional carts can be deployed to provide additional inputs and/or outputs. Notes: 1] If passive loudspeakers are used and/or if local volume adjustment is needed, an RDL VCA and audio power amplifier may be added to the cart; 2] An RDL RU‑MLB4P may be substituted for the RU‑MLB4 if POE power is available through all the network jacks

USE A CATX HOME RUN FOR EACH FORMAT-A SOURCE Power Inserter / Signal Breakout Module Permits Home Run Cabling
USE A CATX HOME RUN FOR EACH FORMAT-A SOURCE
Power Inserter / Signal Breakout Module Permits Home Run Cabling
AN-2236
Description:
In this Format‑A installation, it was not practical to loop CATx cable between the senders in different rooms. A home run from each microphone sender was pulled to the equipment rack. The TX‑TP4PW Power Inserter / Signal Breakout module is used to connect Pairs A, B and C to a single cable run and to insert power. The sources sent on pairs A, B and C are all present on the cable that connects the TX‑TP4PW to the RJ45 input of the TX‑TPR3A Line‑Level Format‑A Receiver. All the Format‑A modules are powered by the external supply connected to the TX‑TP4PW

DISTRIBUTED VGA VIDEO TO MULTIPLE MONITORS Hotel Provides Multiple Video Monitors that Display Daily Schedule of Events
DISTRIBUTED VGA VIDEO TO MULTIPLE MONITORS
Hotel Provides Multiple Video Monitors that Display Daily Schedule of Events
AN-2090
Description:
The daily Calendar of Events listing at this hotel is generated from an office computer. An RDL EZ‑VM14 distributes the VGA signal of the schedule display to three monitors located near the entrances of the hotel meeting rooms. The wide bandwidth of the EZ‑VM14 insures that the same high resolution image seen at the local monitor is seen at each hotel monitor.

CUSTOMERS PLAY PERSONAL AUDIO IN PUBLIC HOUSE BGM Audio System with Wall-Mounted Customer Input for Personal Audio Player CUSTOMERS PLAY PERSONAL AUDIO IN PUBLIC HOUSE
CUSTOMERS PLAY PERSONAL AUDIO IN PUBLIC HOUSE
BGM Audio System with Wall-Mounted Customer Input for Personal Audio Player CUSTOMERS PLAY PERSONAL AUDIO IN PUBLIC HOUSE
AN-2182
Description:
This establishment normally provides patrons with background music from a consumer CD player. Two inputs of the ST‑MX3 Line Level Mixer are used to combine the left and right channels of the CD player’s unbalanced stereo output. On special occasions, customers are encouraged to play music from their personal media players through the house system using a wall‑mounted D‑CIJ3 Consumer Input Jack Panel. The D‑CIJ3 combines the customer’s stereo source to a balanced mono signal that feeds the third balanced input of the mixer module. The local CD player is simply turned off (or paused) when the personal media player is in use.

TABLE-TOP PRESENTATION PERSONAL MONITOR SYSTEM Automatic Attenuation Avoids Feedback Between Pick-Up Mic and Monitor Speaker
TABLE-TOP PRESENTATION PERSONAL MONITOR SYSTEM
Automatic Attenuation Avoids Feedback Between Pick-Up Mic and Monitor Speaker
AN-2205
Description:
This sound system is designed to provide clear communication between two presenters and an assembled group. The two presenter positions are each equipped with a table‑top microphone and loudspeaker. The loudspeakers allow the presenters to clearly hear questions from the audience as well as each other. The audience microphone and the two presenter microphones are mixed in the rack; a line‑level signal feeds the amplifiers for the house and the table‑top loudspeakers. Each RDL ST‑GSP1 Gated Speech Preamplifier provides an automatically‑switched line‑level output from a microphone. When an ST‑GSP1 preamplifier is gated ON, the SLAVE (open‑collector) output mutes its associated ST‑MA2 Monitor Amplifier (and RU‑SP1 Monitor Speaker) and attenuates the adjacent monitor speaker, thereby preventing feedback. (Terminals on the ST‑MA2 can MUTE or provide 3 dB or 6 dB of attenuation while pulled to ground, permitting this wiring method to be expanded to multiple presenter stations.)

ISOLATED MEDIA FEEDS Buffering Multiple High Quality Audio Feeds
ISOLATED MEDIA FEEDS
Buffering Multiple High Quality Audio Feeds
AN-2009
Description:
Speeches, government meetings, product announcements and other media events are occasions where a number of reporters in the electronic press require a high quality audio feed from the event organizers. The recording equipment in use might require a mic, balanced line level or unbalanced line‑level signal. It is critical that each feed is isolated so that if one feed is accidentally shorted or back‑fed, no other feed will be affected nor will the public address system. This example uses RDL STICK‑ONs® to provide isolated audio output signals driving a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Pro 4‑Input Mixer is used as the audio source. The line‑level source is distributed through an ST‑DA3 Audio Distribution Amplifier to line‑level outputs on RCA, 1/4¨ phone, and XLR jacks. The same source is padded down to mic level using an STP‑1 Attenuator and distributed through an STM‑DA3 Microphone Distribution Amplifier to the mic outputs. All jacks shown are on Decora® wall plates. These jacks are available in the RDL AMS series should a rack or tabletop mount be preferred. Distribution of video at these events can also be added using RDL composite and VGA/XGA distribution amplifiers.

AUDIO FOR DIGITAL SIGNAGE Conversion of Speaker Circuits to Line Level for High Fidelity Amplification
AUDIO FOR DIGITAL SIGNAGE
Conversion of Speaker Circuits to Line Level for High Fidelity Amplification
AN-2147
Description:
Video monitors in public spaces often include speakers with insufficient fidelity and/or volume. Such flat panels typically offer only speaker level outputs. This application couples good quality speakers with RDL modules to fill the space with full fidelity audio. The only audio outputs on the flat screen are speaker‑level outputs. Each output channel is fed to the input of an RDL TX‑8A Adjustable Line Transformer which attenuates the signal to a standard balanced (or unbalanced) line level. The line‑level signals are amplified by a pair of ST‑PA18 18 W RMS Power Amplifiers to drive quality loudspeakers. The loop out of each ST‑PA18 is fed to one of the summing inputs on the ST‑CX2S Subwoofer Filter. The ST‑CX2S combines the left/right channels and applies the subwoofer low‑pass crossover. The ST‑CX2S output feeds an ST‑PA18 which is used to drive a subwoofer. This application is often installed on flat panels that have audio amplifier power ratings that should be sufficient for the space if they applied to each channel and were usable RMS power. The ST‑PA18 modules employ integral aurally transparent compression to deliver more of the modules’ average power to the speakers, often producing astounding fidelity when compared against the amplifier/speaker combination in the source flat panel.

CONSUMER TO PRO AUDIO FORMAT CONVERSION Stereo Unbalanced Audio Source Connects to Stereo Balanced Mixer Input
CONSUMER TO PRO AUDIO FORMAT CONVERSION
Stereo Unbalanced Audio Source Connects to Stereo Balanced Mixer Input
AN-2190
Description:
A portable podium is frequently used for presentations in this room. An ST‑UBA2 Unbalanced to Balanced Line Amplifier is installed in the floor box to convert the unbalanced stereo audio signal from a laptop computer or other consumer source to match the balanced stereo inputs of a professional mixer. Each channel is provided with installer‑adjustable gain and a Dual‑LED VU meter to simplify adjustment. A summed mono output is also available. The small size of the ST‑UBA2 permits it to be comfortably installed in a floor box.

HOTEL BATHROOM AUDIO SYSTEM Listen to TV Audio in Guest Room and Bathroom or Without Disturbing Partner
HOTEL BATHROOM AUDIO SYSTEM
Listen to TV Audio in Guest Room and Bathroom or Without Disturbing Partner
AN-2153
Description:
This installation enhances the hotel experience by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A amplifier in the wall allows the guest to adjust the audio as loud as necessary, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV is set to mute its internal speakers, TV audio is only heard in the bathroom. This is ideal if one guest wished to sleep while the other guest is spending time in the bathroom.

AMPLIFIERS FOR MEETING ROOM AND OVERFLOW AREA Conference Facility Audio System with Amplification for Additional Zone
AMPLIFIERS FOR MEETING ROOM AND OVERFLOW AREA
Conference Facility Audio System with Amplification for Additional Zone
AN-2128
Description:
This conference facility uses the HD‑MA35UA 35 Watt Mixer Amplifier as the main integrated audio solution. Two D‑J1 Decora XLR Wall Plates feed the microphone inputs on the mixer section of the HD‑MA35UA. An RLC10KM provides a level control for the 70 Volt speakers serving the main conference room. The Zone 1 Line Output from the HD‑MA35UA provides audio to the overflow seating area behind the meeting room. An FP‑35A 35 Watt Audio Amplifier powers the 70 Volt speakers in the expansion section. The audio level in this area is adjusted by an RLC10KM connected to an ST‑VCA3 Voltage Controlled Amplifier. The ST‑VCA3 is powered by the auxiliary module 24 Vdc power output from the HD‑MA35UA. The HD‑MA35UA and FP‑PA35A both enter an automatic sleep mode to provide significant energy and cost savings when the system is idle.

FORMAT-A SOURCE SELECTOR & IN-WALL AMPLIFIER Distribute Three Audio Sources to Multiple Locations Over UTP Cable
FORMAT-A SOURCE SELECTOR & IN-WALL AMPLIFIER
Distribute Three Audio Sources to Multiple Locations Over UTP Cable
AN-2224
Description:
Three styles of music are distributed to various rooms in this facility over CAT 5 cable by an RU‑TPS4A Format‑A Active Sender / Distributor. A D Series‑TPRX3A Source Selector, D Series‑PA3 Audio Amplifier and D SERIES‑SP1A 8 Ohm loudspeaker installed in each room allow the occupants to listen to any of the three types of music provided or to listen to their own program material simply by plugging their MP3 player into the front‑panel input on the D‑PA3 amplifier. The front‑panel local input overrides the distributed audio. The D‑SP1A loudspeaker provides rich detailed sound in a compact Decora compatible format.

NETWORKED AUDIO Meeting Room Audio using a Centralized Processor
NETWORKED AUDIO
Meeting Room Audio using a Centralized Processor
AN-2225
Description:
In this facility, all meeting room audio inputs and outputs are networked with a centralized processor to avoid the cost and logistical issues of installing processors in each room. A single run of CATx cable looped between the three wall‑mounted Format‑A input modules and the RU‑FN Format‑A to Dante Interface module is the only installed cabling required for audio inputs in this meeting room. The line‑level output of a wireless microphone receiver is fed to the Aux Input of the network interface. The Format‑A input modules are powered from the RU‑FN.

AUTOMATIC CONTROL OF RESTAURANT AV SYSTEM POWER Conserve Energy and Provide Unattended Operation
AUTOMATIC CONTROL OF RESTAURANT AV SYSTEM POWER
Conserve Energy and Provide Unattended Operation
AN-2107
Description:
The RDL FP‑ECC1 Energy Conservation Controller automatically powers up the electronics for this restaurant when needed and powers down the equipment when the restaurant is vacant to conserve energy and reduce operating costs. Motion sensors in the restaurant public areas trigger the FP‑ECC1 to switch on the system equipment power outlets. Continued activity in the seating areas will retrigger the FP‑ECC1 to keep the system turned on. After a switch‑selectable time period of 15, 30, or 60 minutes with no activity, the FP‑ECC1 will turn off the system electronics. No operator intervention is needed to turn the system on or off. An STM‑2 Microphone Preamplifier amplifies the reception desk paging microphone to line level. The associated push‑to‑talk switch causes the ST‑VP1 Voice‑Over/Paging Module to insert paging mic announcements through the house system. The D‑ECR1L Power On/Off Remote Control allows the system to be manually turned on and/or off. It also provides a system master level control to adjust the volume of the RU‑PA40D 40 Watt Stereo Power Amplifier.

HOTEL BATHROOM AUDIO FROM TV Amplifier Provides Speaker-Level Mono Mix
HOTEL BATHROOM AUDIO FROM TV
Amplifier Provides Speaker-Level Mono Mix
AN-2065
Description:
This drawing provides a simple way to listen to hotel room television audio in the adjacent bathroom.

The ST‑PA6 has several unique features that make it ideal for this application. Its input allows combining a stereo signal to a mono sum while retaining isolation between the two input signals. The ST‑PA6 has a bass equalization adjustment that allows the installer to perform some loudness compensation.

This example shows the use of a variable level output from the television receiver. The bathroom audio level follows the level at the television receiver.

MULTI-POINT ROTARY ENCODER LEVEL CONTROL Multiple Control Points for Room or Zone Audio Level with Supervisor Mute Control
MULTI-POINT ROTARY ENCODER LEVEL CONTROL
Multiple Control Points for Room or Zone Audio Level with Supervisor Mute Control
AN-2171
Description:
In this office sound system, the audio level in the employee work area may be adjusted from two different locations in the area and by the supervisor. Two D‑RLC10 wall‑mounted Remote Level Controls provide rotary volume adjustment and visual indication of the level adjustment in the work area. The supervisor’s D‑RLC10M Remote Level Control with Muting is further equipped with a front‑panel mute button which cannot be overridden by the work area controls. When active, the D‑RLC10M MUTE function shuts off the audio signal. When MUTE is toggled off, audio is restored to the previously set level. The single D‑RLC10M and two D‑RLC10s are shown controlling an RDL ST‑VCA3, or they may be used with any RDL VCA or OEM product requiring a 0 to 10 Vdc Ramp to control level.

MEDIA FEED DISTRIBUTION Buffering Multiple High Quality Audio Feeds
MEDIA FEED DISTRIBUTION
Buffering Multiple High Quality Audio Feeds
AN-2140
Description:
Speeches, government meetings, product announcements and other media events covered by reporters require multiple high quality audio feeds in the press room. The recording equipment may require a balanced or unbalanced line level or mic‑level signal. Each output feed must be isolated so that if one output is accidentally shorted or back‑fed, all other feeds and the public address system remain unaffected. An RDL RU‑ADA4D Audio Distribution Amplifier provides isolated audio output signals that drive a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Professional 4‑Input Mixer with selectable compressor is used to mix the audio sources. The line‑level mix is distributed by the RU‑ADA4D to up to 8 line‑level outputs on RCA, 1/4" phone, or XLR jacks. Three of its outputs are padded down to mic level using RDL TX‑LM2 line‑level to microphone‑level transformers. All jacks shown are on Decora® compatible wall plates. These jacks are also available in the RDL AMS series should a custom rack or tabletop configuration be preferred. Video distribution may be added using RDL composite and VGA/XGA distribution amplifiers.

DISTRIBUTED AUDIO FOR EXERCISE FACILITY SourceFlex System Provides Individual Headphone Stations
DISTRIBUTED AUDIO FOR EXERCISE FACILITY
SourceFlex System Provides Individual Headphone Stations
AN-2088
Description:
Each piece of exercise equipment is outfitted with an RDL SAS‑HC8 Headphone Control Station so that users can select from eight audio programs and adjust volume to their own preference. Six audio sources in this system are associated with video monitors at the front of the room. A TX‑J2 Unbalanced Input Transformer is used to combine each stereo signal to mono. Two other channels are from radio or satellite receivers. The SAS‑8i Audio Input Chassis also provides an “all call” paging input.

The SAS‑8i supports four SourceFlex listening stations and multiple SourceFlex expansion chassis’. Listening station expansion may be added in groups of two with the SAS‑82 2 Station Audio Controller or in groups of eight with the SAS‑8C 8 Station Audio Controller. There is no practical limit to the number of listening stations in any system. Connections between the controller and each listening station use a multi‑conductor twisted‑pair cable. The SourceFlex system is reliable and cost effective without the problems of wireless systems with rechargable batteries.

4 x 1 STEREO AUDIO SWITCHING IN A CLASSROOM Remote Source Selection and Volume Control
4 x 1 STEREO AUDIO SWITCHING IN A CLASSROOM
Remote Source Selection and Volume Control
AN-2211
Description:
The classroom is equipped with three A/V sources (Computer, DVD and VCR) and an audio‑only input on a wall plate. Staff selects the audio source and sets the level through the RDL RU‑ASX4DR Remote Controlled Audio Selector using a D‑RC4M Four Channel Remote Control and a D‑RLC10M Remote Level Control. All video signals are run directly to the projector which provides video source selection. Sources may be muted by simply de‑selecting the active input at the D‑RC4M or by operating the MUTE switch on the D‑RLC10M. The D‑CIJ3D Consumer Input Jack Panel is used to balance the stereo signal of an MP3 player or any consumer source and to provide galvanic isolation.

AUDIO SOURCE SELECTION & LEVEL CONTROL Multiple Control Locations in a Multi-Purpose Meeting Room / Auditorium
AUDIO SOURCE SELECTION & LEVEL CONTROL
Multiple Control Locations in a Multi-Purpose Meeting Room / Auditorium
AN-2212
Description:
The multi‑purpose room is provided with four different line‑level audio sources. Users of the room are able to select their desired source and adjust the audio level from within the space. The RU‑ASX4DR Remote Controlled Audio Selector with VCA is controlled by two D‑RC4M Four Channel Remote Controls (source selectors) and two D‑RLC10 Remote Level Controls (0 to 10 Vdc). Two control locations are shown; up to ten remote locations are possible. All sources may be muted by de‑selecting the active input on either D‑RC4M. The D‑CIJ3D Consumer Interface Jack Panel is used for connection of a user‑supplied audio source.

HOTEL BATHROOM AUDIO FROM TV Amplification with VCA Level Control
HOTEL BATHROOM AUDIO FROM TV
Amplification with VCA Level Control
AN-2067
Description:
The compact size of the RDL modules make installation of a monitor speaker with remote volume control in a hotel suite bathroom an easy task.

The TX‑J2 provides a balanced mono sum of the stereo unbalanced output of the television receiver. The ST‑VCA3 adjusts audio level set using the RLC10KS that is wall‑mounted in the bathroom. The ST‑PA18 power amplifier incorporates an on‑board compressor/limiter and can provide up to 18 Watts RMS to power an 8 Ohm speaker. The full electronic package is small enough to easily be placed in a TV armoire.

This example uses the fixed output level from the television receiver. The bathroom audio level is controlled by the RLC10KS remote control.

AUTOMATIC CONTROL OF HOTEL AUDIO SYSTEM POWER Conserve Energy and Simplify Unattended Operation
AUTOMATIC CONTROL OF HOTEL AUDIO SYSTEM POWER
Conserve Energy and Simplify Unattended Operation
AN-2105
Description:
The RDL FP‑ECC1 Energy Conservation Controller automatically powers up the electronics for this hotel meeting room when needed and powers down the equipment when the audio sources are not in use to conserve energy and reduce operating costs. “Trigger” inputs bridge the mic and/or line level signals from the room to switch the system equipment on. Once on, the presence of a line level signal from the RU‑MX4 Mixer at the “hold” input keeps the system powered. After a switch‑selectable time period of 15, 30, or 60 minutes with no audio, the FP‑ECC1 will turn off the system electronics. No operator intervention is needed to turn the system on or off. The RLC10K wall control connected to the ST‑VCA3 Voltage Controlled Amplifier allow adjustment of background music levels when there is no live event in the room. The D‑ECR1L Power On/Off Remote Control allows the system to be manually turned on and/or off. It also provides a system master level control to adjust the volume of the RU‑PA40D 40 Watt Stereo Power Amplifier.

REMOTE SWITCHING OF SPEAKER-LEVEL SIGNALS Noise Mitigation at an Outdoor Restaurant Patio
REMOTE SWITCHING OF SPEAKER-LEVEL SIGNALS
Noise Mitigation at an Outdoor Restaurant Patio
AN-2174
Description:
At this restaurant, the outdoor patio loudspeakers are required to be turned off when no customers are seated there. The ST‑LCR1H High Power Logic Controlled Relay is capable of switching up to 500 W of amplified audio. The D Series‑RT2 Remote Control Selector is used to operate the ST‑LCR1H from a secure location. The ST‑LCR1H connects or disconnects the outdoor speakers. The D‑RT2 provides visual ON and OFF indication of the outdoor speakers.

LINE LEVEL MEDIA FEED DISTRIBUTION Buffering High Quality Audio Feeds
LINE LEVEL MEDIA FEED DISTRIBUTION
Buffering High Quality Audio Feeds
AN-2141
Description:
Speeches, government meetings, product announcements and other media events covered by reporters require multiple high quality audio feeds in the press room. The recording equipment may require a balanced or unbalanced line level or mic‑level signal. Each output feed must be isolated so that if one output is accidentally shorted or back‑fed, all other feeds and the public address system remain unaffected. An RDL RU‑ADA8D Audio Distribution Amplifier provides isolated audio output signals that drive a variety of audio jacks on a "Media Panel." An RDL RU‑MX4 Professional 4‑Input Mixer with selectable compressor is used to mix the audio sources. The line‑level mix is distributed by the RU‑ADA8D to up to 16 line‑level outputs on RCA, 1/4" phone, or XLR jacks. Any of these outputs could be padded down to mic level using RDL TX‑LM2 line‑level to microphone‑level transformers. All jacks shown are on Decora® compatible wall plates. These jacks are also available in the RDL AMS series should a custom rack or tabletop configuration be preferred. Video distribution may be added using RDL composite and VGA/XGA distribution amplifiers.

HOTEL ROOM ENHANCED AUDIO SYSTEM Private In-Wall Bedside and Bathroom TV Audio that Mutes During Emergency Paging
HOTEL ROOM ENHANCED AUDIO SYSTEM
Private In-Wall Bedside and Bathroom TV Audio that Mutes During Emergency Paging
AN-2165
Description:
The hotel guest experience is enhanced in this application by allowing each guest to choose when and where to listen to the TV sound. In the bedroom, one guest may wish to watch and listen to the TV while the guest’s partner does not. With the TV speakers muted, either guest can watch and listen to the TV by plugging personal headphones into a bedside ‑HA1A Headphone Amplifier with locally adjustable volume. Their partner can read or sleep in silence. This installation further enhances the hotel stay by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A wall‑mounted amplifier allows a guest to set the volume as high as needed, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV internal speakers are muted, TV audio is only heard in the bathroom. This is ideal if one guest sleeps in or reads a newspaper while the other guest is using the bathroom. This installation assures guests have the opportunity to hear emergency paging by automatically shutting off the headphone and restroom amplifiers. During a facility‑wide emergency page, the TX‑PCR1 Paging Controlled Relay shuts off power to the hotel room audio system. With no power applied to the FP‑TPS4A the guest room audio system is muted making it possible for the hotel guests to hear the emergency page. Once the page is completed the TX‑PCR1 reapplies power to the FP‑TPS4A, returning the audio system to normal operation. (NOTE: The TX‑PCR1 must be installed so that its power is not interrupted

KARAOKE SYSTEM Microphone Compressor and Power Amplifier
KARAOKE SYSTEM
Microphone Compressor and Power Amplifier
AN-2139
Description:
This example shows the use of the RDL EZ‑MCP1 Microphone Compressor and the RDL HD‑PA35U Power Amplifier in a Karaoke system. The EZ‑MCP1 is an in‑line device that connects between a dynamic or condenser microphone and the mic‑level input of the Karaoke machine. When properly adjusted, it will produce consistent audio levels despite wide variations of up to 30 dB from the microphone and will control signal overloads that cause distortion and clipping. The output of the HD‑PA35U Power Amplifier is rated at 35 W RMS into a 4Ω or 8 Ω load. The included analog compressor/limiter allows the amplifier to produce audio output levels and clarity normally expected from amplifiers with a much higher output rating. Additionally, the amplifier includes Sleep Mode circuitry that puts the amplifier into standby mode after a predetermined period of time with no audio at the input. The presence of signal at the input causes the HD‑PA35U to return to full operation.

AMPLIFICATION FOR OUTDOOR POLE-MOUNT SPEAKERS Pole Mounted Power Amp Operation in Extreme Temperatures
AMPLIFICATION FOR OUTDOOR POLE-MOUNT SPEAKERS
Pole Mounted Power Amp Operation in Extreme Temperatures
AN-2125
Description:
This outdoor parking area is equipped with speakers mounted in the lamp structures to provide music and paging coverage. Speakers in each pole are powered by an RDL FP‑PA18H 18 Watt Hi‑Temp Audio Amplifier. The amplifier module is mounted in an unventilated watertight enclosure at the base of each pole. The poles recieve direct sunlight causing the potential for high internal ambient air temperatures. The highly efficient FP‑PA18H is ideally suited to this environment. It is designed for operation in ambient temperatures up to 70 degrees Celsius (about 158 degrees Fahrenheit) and contributes negligible heat to the ambient temperature inside the pole. The amplifier’s integral compressor/limiter insures maximum intelligibility by keeping average power levels high and preventing clipping. The FP‑PA18H combines RDL's high audio performance standards with the capability of operation in harsh temperature environments. Notes: 1] If it is desired to monitor the operation of the complete system, the audio detector included in each FP‑PA18H can be wired back to the system audio rack to confirm that audio is being received and amplified at each pole. 2] If the FP‑PA18H is acquired with an RDL power supply, that supply must be located in an ambient environment not to exceed 40 degress C. FP‑PA18H modules are available without a power supply for use with high temperature supplies or in systems using distributed 24 Vdc power. Contact RDL Technical Support for more information.

HOTEL BATHROOM AUDIO SYSTEM Listen to TV Audio in Guest Room and Bathroom or Without Disturbing Partner
HOTEL BATHROOM AUDIO SYSTEM
Listen to TV Audio in Guest Room and Bathroom or Without Disturbing Partner
AN-2153
Description:
This installation enhances the hotel experience by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A amplifier in the wall allows the guest to adjust the audio as loud as necessary, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV is set to mute its internal speakers, TV audio is only heard in the bathroom. This is ideal if one guest wished to sleep while the other guest is spending time in the bathroom.

HOTEL BATHROOM STEREO AUDIO FROM TV Compact Amplifier Integrates VCA and Compressor/Limiter
HOTEL BATHROOM STEREO AUDIO FROM TV
Compact Amplifier Integrates VCA and Compressor/Limiter
AN-2066
Description:
Providing stereo monitor speakers with remote volume control in a hotel suite bathroom is done easily with the RU‑PA40D.

The extremely compact RU‑PA40D drives stereo 4 or 8 Ohm speakers and has an integral VCA which allows use of a 10 kΩ linear potentiometer to control level. This example uses the RLC10KS remote control to create an aesthetically pleasing and professional appearance. The RU‑PA40D also features a studio quality compressor/limiter to control clipping and maximize average output levels. An input selector switch allows the unit to output a mono sum in installations where speaker placement cannot produce proper stereo imaging.

This example uses the fixed output level from the television receiver. The bathroom audio level is controlled by the RLC10KS remote control.

4 x 1 STEREO AUDIO SOURCE SELECTION Remotely Select From Four Stereo Audio Sources and Control Level in Lounge or Restaurant
4 x 1 STEREO AUDIO SOURCE SELECTION
Remotely Select From Four Stereo Audio Sources and Control Level in Lounge or Restaurant
AN-2210
Description:
The RU‑ASX4DR Remote Controlled Audio Selector allows patrons of this establishment to enjoy a variety music sources or the opportunity to watch and listen to television broadcasts. The D‑RC4M Four Channel Remote Control and D‑RLC10M Remote Level Control allow the staff to select the desired program source and to adjust the audio level. Sources may be muted by simply de‑selecting the active input at the D‑RC4M or by pressing the MUTE button on the D‑RLC10M. The D‑CIJ3D Consumer Input Jack panel is used to balance the stereo signal of an MP3 player and to provide galvanic isolation.

HOTEL ROOM ENHANCED AUDIO SYSTEM Private Bedside TV Audio Without Disturbing Partner and Adjustable Bathroom TV Audio
HOTEL ROOM ENHANCED AUDIO SYSTEM
Private Bedside TV Audio Without Disturbing Partner and Adjustable Bathroom TV Audio
AN-2161
Description:
The hotel guest experience is enhanced in this application by allowing each guest to choose when and where to listen to the TV sound. In the bedroom, one guest may wish to watch and listen to the TV while the guest’s partner does not. With the TV speakers muted, either guest can watch and listen to the TV by plugging personal headphones into a bedside ‑HA1A Headphone Amplifier with locally adjustable volume. Their partner can read or sleep in silence. This installation further enhances the hotel stay by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A wall‑mounted amplifier allows a guest to set the volume as high as needed, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV internal speakers are muted, TV audio is only heard in the bathroom. This is ideal if one guest sleeps in or reads a newspaper while the other guest is using the bathroom.

HOTEL ROOM ENHANCED AUDIO SYSTEM Private Nightstand Bedside and Bathroom TV Audio that Mutes During Emergency Paging
HOTEL ROOM ENHANCED AUDIO SYSTEM
Private Nightstand Bedside and Bathroom TV Audio that Mutes During Emergency Paging
AN-2162
Description:
The hotel guest experience is enhanced in this application by allowing each guest to choose when and where to listen to the TV sound. In the bedroom, one guest may wish to watch and listen to the TV while the guest’s partner does not. With the TV speakers muted, either guest can watch and listen to the TV by plugging personal headphones into a bedside TP‑HA1A Headphone Amplifier with locally adjustable volume. Their partner can read or sleep in silence. This installation further enhances the hotel stay by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A wall‑mounted amplifier allows a guest to set the volume as high as needed, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV internal speakers are muted, TV audio is only heard in the bathroom. This is ideal if one guest sleeps in or reads a newspaper while the other guest is using the bathroom. This installation assures guests have the opportunity to hear emergency paging by automatically shutting off the headphone and restroom amplifiers. During a facility‑wide emergency page, the TX‑PCR1 Paging Controlled Relay shuts off power to the hotel room audio system. With no power applied to the FP‑TPS4A the guest room audio system is muted making it possible for the hotel guests to hear the emergency page. Once the page is completed the TX‑PCR1 reapplies power to the FP‑TPS4A, returning the audio system to normal operation. (NOTE: The TX‑PCR1 must be installed so that its power is not interrupted during emergency paging. Two power supplies are shown. This application may be powered from a single power supply. Contact RDL Technical Support for more details.)

HOTEL ROOM ENHANCED AUDIO SYSTEM Private Bedside TV Audio and Adjustable Bathroom TV Audio with Personal Audio Inputs
HOTEL ROOM ENHANCED AUDIO SYSTEM
Private Bedside TV Audio and Adjustable Bathroom TV Audio with Personal Audio Inputs
AN-2157
Description:
The hotel guest experience is enhanced in this application by allowing each guest to choose when and where to listen to in‑room media. In the bedroom, one guest may wish to watch and listen to the TV while the guest’s partner does not. With the TV speakers muted, either guest can watch and listen to the TV by plugging personal headphones into a bedside ‑HA1A Headphone Amplifier with locally adjustable volume. Their partner can read or sleep in silence. This installation further enhances the hotel stay by allowing the TV audio to be heard clearly while getting ready for the day. The ‑TPA1A wall‑mounted amplifier allows a guest to set the volume as high as needed, even with shower water running. Intelligibility of the TV audio is not dependent on the volume setting in the guest room. If the TV internal speakers are muted, TV audio is only heard in the bathroom. This is ideal if one guest sleeps in or reads a newspaper while the other guest is using the bathroom. Some guests may wish to listen to a personal media device or laptop computer. These can be connected into any of the three ‑TPS8A wall‑mounted input panels strategically located within the hotel room. Audio connected to any of the ‑TPS8A panels is fed through the FP‑TPSR4A to the AUX input on the TV. Upon selection of the AUX input on the TV remote control, the personal media source can be heard on the ‑HA1A bedside Headphone Amplifiers and in the restroom.

DISTRIBUTED OUTDOOR SOUND User Audio Input And Level Control
DISTRIBUTED OUTDOOR SOUND
User Audio Input And Level Control
AN-2031
Description:
An unbalanced stereo audio signal (RCA jacks or Mini‑jack) from an external source (MP3 shown) is summed and converted to balanced mono using the DS‑CIJ3 Consumer Input Jack plate. An RDL FP‑PA20A 20 Watt Audio Power Amplifier feeds 70 Volt outdoor loudspeakers in the patio seating area. The wall‑mounted RLC10KS Remote Control allows users to adjust the audio level on the patio. The RLC10KS controls the ST‑VCA3 Voltage Controlled Amplifier which sets the audio input level to the power amplifier. An FP‑PA20B 20 Watt 25 Volt Power Amplifier may be used in place of the FP‑PA20A if a 25 Volt system is desired.

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