MCM Electronics

35~75dB Gain High Gain Mic Preamp By Radio Design Labs (STM-3) MCM Part #555-18894

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MSRP: $213.99
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High Gain Microphone Preamplifier - 35 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.

Specifications Top

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 ohm balanced; 5 Kohm unbalanced
Phantom: 24VDC; IEC 1938: 1996-12, Filtered
Output (2): +4 dBu 150 ohm 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 ohm 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

Part Numbers
MCM Part #:555-18894
Radio Design Labs Part #:STM-3
Package Specifications & Dimensions
Weight:0.1 lbs.
RoHS Comp:Yes
Warranty:1095 days
Need to Return?
Length:4 in.
Width:2 in.
Height:2 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

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