Description
The STM-1 is a low-cost quality microphone preamplifier designed for use in commercial sound and broadcast applications. The compact size makes it ideal where a larger or heavier preamp cannot be used. The high-performance circuit provides a fixed 50 dB gain to bring any mic-level signal up to the line-level range of nearly any line input. The STM-1 supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. For intercom applications, the input will operate directly from a speaker
Some features of the STM-1 are:
- Balanced microphone input accepts dynamic or condenser microphones
- Input circuitry permits connection of unbalanced microphones, and 4 or 8 speakers in intercom ormonitoring applications
- Fixed 50 dB gain and ample headroom allow operation with any mic
- Phantom supply input terminals allow connection of phantom power when STM-1 is used with condenser microphones
- Ground-referenced supply input operates from 24 Vdc to 33 Vdc (12 Vdc at reduced headroom)
- Separate balanced and unbalanced line-level outputs
- No lugs required for reliable connections
- Convenience of STICK-ON package yields quick, efficient installation