RDL STM2 Adjustable Gain Microphone Preamplifier

Herman # RDLSTM2
MFR # STM-2
RDL

$138.45

RDL RDL

RDL STM-2

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.
 
Features:
  • 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

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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Part NumberPriceQty.

RDLSTM2

$138.45

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