• RDL STM-1 Microphone Preamp
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RDL STM-1 Microphone Preamp

RDL STM-1 Microphone Preamp

SoundPro Item: 77477 | Part Number: STM-1

$154.46
$205.95 $154.46
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MSRP: $205.95 | MAP: $154.46

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  • High or low impedance input mic preamp
  • Fixed 50 dB gain for consistency
  • Balanced or unbalanced output
  • Phantom capability
  • RF-filtered inputs and outputs
  • Excellent performance
  • STICK-ON® convenience
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The STM-1 is a low-cost quality microphone preamplifier designed for use in commercial sound and broadcast applications. The compact size makes it ideal where a larger or heavier preamp cannot be used. The high-performance circuit provides a fixed 50 dB gain to bring any mic-level signal up to the line-level range of nearly any line input. The STM-1 supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. For intercom applications, the input will operate directly from a speaker.

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Specifications

Electrical
Phantom
24 Vdc; IEC 61938: 2013, Filtered
THD+N
<0.05%
Phantom Power Input
24 Vdc @ 10 mA max.
Power Requirement
GROUND-REFERENCED, 24 Vdc @ 25 mA
Audio
Frequency Response
50 Hz to 30 kHz (± 1.5 dB)
Connectivity
Input
500 Ω balanced; 5 kΩ unbalanced
Outputs (2)
+4 dBu 150 Ω balanced; -10 dBv unbalanced
Construction
Gain
50dB nominal
General
Residual Noise
< -70 dB (below +4 dBu; 150 Ω source @ 50 dB gain)
Headroom
> 20 dB (24 Vdc supply); > 14 dB (12 Vdc supply)
Audio Performance
CMRR
>50 dB (50 Hz to 20 kHz)

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