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High Gain Microphone Preamplifier - 35 to 75 dB gain

$172.00

•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

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 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.


Typical Performance:

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 to 33 Vdc @ 10 mA maximum

Power Requirement:
GROUND‑REFERENCED, 24 to 33 Vdc @ 25 mA

Ambient Operating Environment:
0° C to 55° C



Data/Installation

Add to Cart:

  • Model: STM-3
  • Shipping Weight: 0.5lbs
  • 10 Units in Stock
  • Manufactured by: RDL -Radio Design Labs


This product was added to our catalog on Friday 04 June, 2010.

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