Signal Processing Systems : Preamplifiers : RDL, Radio Design Labs - STM-1

Microphone Preamplifier - 50 dB Gain

Series:

Model: STM-1

High or Low Impedance Input Mic Preamp
Fixed 50 dB Gain for Consistency
Balanced or Unbalanced Output
Phantom Capability
RF-Filtered Inputs and Outputs

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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 to 33 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.

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

Preamplifier Signal Type - Audio

Operating Temperature (Maximum): 131 F
Operating Temperature (Minimum): 32 F
Inputs: 500 ohm balanced; 5 k ohm unbalanced
Phantom: 24 VDC
Outputs (2): +4 dBu 150 ohm balanced; -10dBv unbalanced
Frequency Response: 50 to 20000 Hz (+/- 1.5 dB)
Gain: 50 dB nominal
THD+N: < 0.05 %
CMRR: > 60 dB (50 Hz to 30 kHz)
Residual Noise: < -70 dB (below +4 dBu; 150 ohm source @ 50 dB gain)
Headroom: > 20 dB (24 Vdc supply);
> 14 dB (12 Vdc supply)
Phantom Power Input: 24 to 33 VDC @ 10 mA
Power Requirement: 24 to 33 VDC @ 25 mA

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Preamplifier 299 kb - Other

Project List

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DRA-35S6
STICK-ON DIN Rail Adapter

DTB
STICK-ON® Series Detachable Terminal Block

MB-1
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MB-3
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MSR-1
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SMK-12
STICK-ON Mounting Plate

SR-10
STICK-ON Series Mounting Rack - 10 Modules

SR-12A
STICK-ON Series 19" Mounting Rack - 12 modules

STR-19A
STICK-ON Series Racking System - 12 Modules

STR-19B
Hinged 19-inch Rack Mount Panel

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