1 1

RDL STM-3 High Gain Microphone Preamp

RDL STM-3 High Gain Microphone Preamp

SoundPro Item: 77479 | Part Number: STM-3

$235.60
$314.13 $235.60
Your Price Sold out
MSRP: $314.13 | MAP: $235.60

Usually ships in 5-7 business days

  • 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
Log in or register for YOUR best price

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.

View full details
  • Input500 Ω balanced; 5 kΩ unbalanced
  • Phantom24 Vdc; IEC 61938: 2013, Filtered
  • Outputs (2)+4 dBu 150 Ω balanced; -10 dBv unbalanced
  • Frequency Response50 Hz to 30 kHz (± 1.5 dB)
  • GainAdjustable 45 to 75 dB
  • THD+N<0.05% (50dB gain)
  • CMRR>50 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 Input24 Vdc @ 10 mA max.
  • Power RequirementGROUND-REFERENCED, 24 Vdc @ 25 mA
  • Dimensions (HxWxD)0.7" x 3" x 1.6"

Why Choose SoundPro?

Since 1973, SoundPro has been the trusted source for audio, video, and lighting gear. Whether you're starting your AVL journey or are a seasoned professional, we're here to help you every step of the way.

Start Shopping

  • Certified Account Managers

    Our Account Managers, with 16+ industry certifications, are ready to find your solution.

  • Personalized Pricing

    We know every project is unique. Get a personalized quote anytime you need it

  • Fast Shipping & Local Pickup

    In stock items ship same day if ordered by 4pm CST. Pickup offered in Irving, TX.

  • Accountability from Real People

    We aim for a smooth, transparent experience by setting and sticking to clear expectations.

  • Easy Payments & Financing

    We accept all major credit cards and also offer financing through our partners.

1 2