RDL STM-3 High Gain Mic Preamp
Availability:
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Description
The STM-3 is a quality low-noise microphone preamplifier designed for use in surveillance, commercial sound, broadcast, and recording where higher than normal gain is required. The STM-3 is very flexible, with gain adjustment from 45 to 75 dB, two balanced or unbalanced outputs, and available phantom supply input. Its low-distortion and low-noise performance make it the best choice, even when larger preamps could be used. The STM 3 supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. Each output drives high or low impedance loads.
Features
- Low-Noise, High-Gain, Mic Preamp
- Adjustable Output Levels
- High or Low Impedance Mic Inputs
- Mic Input to Line Outputs
- Two Balanced or Unbalanced Outputs
- Phantom Capability
- RF-Filtered Inputs
| Input | 500 O balanced; 5 kO unbalanced |
| Phantom | 24Vdc; IEC 1938: 1996-12, Filtered |
| Output (2) | +4 dBu 150 O balanced; -10 dBV unbalanced |
| Frequency Response | 50 Hz to 25 kHz (+/- 1 dB) |
| Gain | Adjustable 45 to 75 dB |
| THD+N | < 0.05% (50 dB gain) |
| CMRR | > 60 dB (50 Hz to 20 kHz) |
| Residual Noise | < -70 dB (below +4 dBu, 150 O source) |
| Headroom | > 20 dB (24 Vdc supply); 14 dB (12 Vdc supply) |
| Phantom Power Input | 24 Vdc @ 10 mA maximum |
| Power Requirement | GROUND-REFERENCED, 24 Vdc @ 25 mA |
| Ambient Operating Environment | 0¡ C to 55¡ C |
The STM-3 is a quality low-noise microphone preamplifier designed for use in surveillance, commercial sound, broadcast, and recording where higher than normal gain is required. The STM-3 is very flexible, with gain adjustment from 45 to 75 dB, two balanced or unbalanced outputs, and available phantom supply input. Its low-distortion and low-noise performance make it the best choice, even when larger preamps could be used. The STM 3 supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. Each output drives high or low impedance loads.
Features
- Low-Noise, High-Gain, Mic Preamp
- Adjustable Output Levels
- High or Low Impedance Mic Inputs
- Mic Input to Line Outputs
- Two Balanced or Unbalanced Outputs
- Phantom Capability
- RF-Filtered Inputs
| Input | 500 O balanced; 5 kO unbalanced |
| Phantom | 24Vdc; IEC 1938: 1996-12, Filtered |
| Output (2) | +4 dBu 150 O balanced; -10 dBV unbalanced |
| Frequency Response | 50 Hz to 25 kHz (+/- 1 dB) |
| Gain | Adjustable 45 to 75 dB |
| THD+N | < 0.05% (50 dB gain) |
| CMRR | > 60 dB (50 Hz to 20 kHz) |
| Residual Noise | < -70 dB (below +4 dBu, 150 O source) |
| Headroom | > 20 dB (24 Vdc supply); 14 dB (12 Vdc supply) |
| Phantom Power Input | 24 Vdc @ 10 mA maximum |
| Power Requirement | GROUND-REFERENCED, 24 Vdc @ 25 mA |
| Ambient Operating Environment | 0¡ C to 55¡ C |
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