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Learn More About the RDL STM-2

 
RDL STM-2 Adjustable Gain Microphone Preamplifier - 35 to 65 dB Gain
     
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    RDL STM-2 Adjustable Gain Microphone Preamplifier - 35 to 65 dB Gain

    Manufacturer: Radio Design Labs

    Item #: STM-2   •   MFG #: STM-2

     

    List Price:$194.04
    Our Price:$139.95

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      The RDL 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 low noise performance make it the best choice, even when larger preamps could be used.

      The STM 2 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.

      Required Power Supply RDL PS24V Sold Separately

       
      • 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
         
      • Specifications

        • 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 Vdc @ 25 mA
        • Ambient Operating Environment: 0° C to 55° C
         
       
       

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