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Illustrative image of: RDL STM-3: Preamps: STM3

Radio Design Labs STM-3

RDL

BSW PART:
STM3

Mic Preamp

More Preamps More RDL
$242.66 $323.55
You save $80.89

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.

Power Supply Not Included: PS-24AS

$242.66 $323.55
You save $80.89

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  • Main 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
  • Specifications:
  • 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