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Home Products Audio Microphone Products RDL Adjustable Gain Microphone Preamplifier - 35 to 65 dB gain -

RDL Adjustable Gain Microphone Preamplifier - 35 to 65 dB gain -
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RDL Adjustable Gain Microphone Preamplifier - 35 to 65 dB gain -

Mfr # STM-2
( RDL )
Price: $ 120.10


  • Low-Noise Mic Preamp
  • Adjustable Output Level
  • High or Low Impedance Mic Inputs
  • Mic Input to 2 Line Outputs
  • Two Balanced or Unbalanced Outputs
  • Phantom Capability
  • RF-Filtered Inputs

The STM-2 is a quality low-noise microphone preamplifier designed for use in commercial sound, broadcast, and recording. The STM-2 is very flexible, with gain adjustment from 35 to 65 dB, two balanced or unbalanced outputs, and available phantom supply input. Its ultra-low distortion and lownoise performance make it the best choice, even when larger preamps could be used. The single-ended supply input range is from 24 to 33 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. Each output drives high or low impedance loads.

Input:500 Ω balanced; 5 kΩ unbalanced
Phantom:24Vdc; IEC 1938: 1996-12, Filtered
Outputs (2):+4 dBu 150 Ω balanced; -10dBv unbalanced
Frequency Response:50 Hz to 20 kHz (+/- 1.5 dB)
Gain: Adjustable 35 to 65 dB
THD+N:< 0.05% (50 dB Gain)
CMRR: > 60 dB (50 Hz to 30 kHz)
Residual Noise: < -70 dB (below +4 dBu 150 Ω source @ 50 dB gain)
Headroom: > 20 dB (24 Vdc supply);
> 14 dB (12 Vdc supply)
Power Requirement: GROUND-REFERENCED, 24 to 33 Vdc @ 25 mA
Ambient Operating Environment:0° C to 55° C

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Last Updated: Wednesday, 23 May 2012 04:04