RDL STM-2X Switched Microphone Preamplifier - 35 to 65 dB Gain

STM-2X - Overview

• Features:

  • Quiet Switching of Condenser Microphone
  • Remote Microphone Soft‑Switching
  • Switch a Mic‑Level Source to a Mic or Line Level Output
  • Remote Toggle Switch or Push‑to‑Talk Button
  • Adjustable Preset Gain on Microphone Source
   

• Specifications:

  • Input: 500 Ω balanced; 5 kΩ unbalanced
  • Phantom: 24Vdc; IEC 1938: 1996‑12, Filtered
  • Outputs (2):
    - Line Level: +4 dBu 150Ω balanced
    - Mic Level: ‑45 dBu 150Ω balanced
  • Headroom: > 20 dB
  • Gain:
    - Line Level Output: Adjustable 35 to 65 dB
    - Mic Level Output: Adjustable ‑15 to 15 dB
  • Frequency Response: 50 Hz to 20 kHz (+/‑1 dB)
  • THD+N: < 0.05% (50 dB gain)
  • Residual Noise ON: < ‑70 dB (below to +4 dBu; 150 Ω source @ 50 dB gain)
  • OFF Attenuation:
    > 100 dB (1 kHz)
    > 80 dB (50 Hz to 20 kHz)
  • Switch Control Input: Connect to ground to activate signal; 0.5 mA maximum current required
  • Switching Time: < 5 ms (soft‑switching transition on or off)
  • CMRR: > 60 dB (50 Hz or 20 kHz)
  • 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
   

• GTIN:

  0813721011497