Radio Design Labs STM-3 High Gain Microphone Preamplifier

$177.44
PA SKU # RDL STM3 MFR # STM-3 UPC # 813721011060
  • Support Lifetime Tech Support
  • Best Seller Best Seller!
  • Question Ask a Question
Order Now! We'll Ship It Fast! This item is currently out of stock. Most out of stock orders ship within just a few days (excluding weekends and holidays). We'll keep you up to date the whole way.
  • Product Highlights
  • Low-Noise, High-Gain, Mic Preamp
  • Adjustable Output Levels
  • High or Low Impedance Mic Inputs
  • Mic Input to Line Outputs
  • 2 Balanced or Unbalanced Outputs
  • Phantom Capability
  • RF-Filtered Inputs

High Gain Microphone Preamplifier - 45 to 75 dB Gain

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.
  • 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
  • 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
Write Your Own Review
You're reviewing:Radio Design Labs STM-3 High Gain Microphone Preamplifier
Your Rating
Performance Audio, LLC BBB Business Review
Copyright © 2019. All rights reserved. Follow us on Facebook Follow us on Twitter Follow us on Instagram Follow us on YouTube Follow us on Pinterest