RDL STM2
STM-2

OUR PART #  STM2


Radio Design Labs' 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 off to +65 dB, two balanced or unbalanced outputs, and available phantom supply input! Its ultra-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 12 to 33 Vdc! Each output drives high or low impedance loads.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.

RDL STM-2 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

RDL STM-2 Specifications:

  • Input: 500 O balanced; 5 kO unbalanced
  • Phantom: 24 Vdc; IEC 61938: 2013, Filtered
  • Outputs (2): +4 dBu 150 O balanced; -10 dBv unbalanced
  • Frequency Response: 50 Hz to 30 kHz (± 1.5 dB)
  • Gain: Adjustable 35 to 65 dB
  • THD+N: < 0.05% (50 dB Gain)
  • CMRR: >50 dB (50 Hz to 20 kHz)
  • Residual Noise: < -70 dB (below +4 dBu 150 O source @ 50 dB gain)
  • 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
  • Dimensions (HxWxD): 0.7" x 3" x 1.6" (1.7 x 7.6 x 3.9 cm)
  • Package Type: Cardboard Box
  • Package Dimensions: 2" x 2" x 4"
  • Shipping Weight: 0.195 lbs.
  • WEEE weight: 0.145 lbs.
  • Tariff code: 8518.40.2000
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