RDL STM-3 High Gain Microphone Preamplifier
PA SKU # RDL STM3 MFR # STM-3 UPC # 813721011060
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- Product Highlights
- Low-Noise, High-Gain, Mic Preamp
- Adjustable Output Levels
- High or Low Impedance Mic Inputs
- Mic Input to Line Outputs
- 2 Balanced or Unbalanced Outputs
- Phantom Capability
- RF-Filtered Inputs
High Gain Microphone Preamplifier - 45 to 75 dB Gain
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.- 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 Ω balanced; 5 kΩ unbalanced
- Phantom: 24Vdc; IEC 1938: 1996-12, Filtered
- Output (2): +4 dBu 150 Ω 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 Ω 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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