RDL STM-1 Microphone-Amplifier

Features:

Hoch- oder niederohmige Eingangsimpedanz
50 dB Verstärkung
Symmetrischer oder unsymmetrischer Ausgang
Anschluss für Phantomspeisung vorhanden
HF-Filter an Ein- und Ausgängen


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.


Input: 500 Ω balanced; 5 kΩ unbalanced
Phantom: 24 Vdc; IEC 61938: 2013, Filtered
Outputs (2): +4 dBu 150 Ω balanced; -10 dBv unbalanced
Frequency Response: 50 Hz to 30 kHz (± 1.5 dB)
Gain: 50 dB nominal
THD+N: < 0.05%
CMRR: >50 dB (50 Hz to 20 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)
Phantom Power Input: 24 Vdc @ 10 mA maximum
Ambient Operating Environment: 0° C to 55° C
Power Requirement: GROUND-REFERENCED, 24 Vdc @ 25 mA
Package Type: Cardboard Box
Package Dimensions: 2 x 2 x 4 in.
Shipping Weight: 0.195 lbs.
WEEE weight: 0.145 lbs.