Product Description
RDL STM-2X Switched Microphone Preamplifier - 35 to 65 dB gain
Overview
The STM-2X is the ideal choice in many installations where a microphone preamplifier is required, and is the ideal choice where either a toggle-type switch or push-to-talk switch is to be provided for microphone control, particularly if condenser microphones are used.
Power Supply Not Included
Recommended Power Supply:
- PS-24AS (USA)
- PS-24AX (International)
Features
- Quiet Switching of Condenser Microphone
- Remote Microphone Soft-Switching
- Switch a Mic-Level Source to a Mic or Line Level Output
- Remote Toggle Switch or Push-to-Talk Button
- Adjustable Preset Gain on Microphone Source
Specifications
Input: 500 Ω balanced; 5 kΩ unbalanced
Phantom: 24 Vdc; IEC 61938: 2013, Filtered
Outputs (2): Line Level: +4 dBu 150Ω balanced Mic Level: -45 dBu 150Ω balanced
Headroom: > 20 dB
Gain: Line: Adjustable 35 to 65 dB; Mic Level Output: Adjustable -15 to 15 dB
Frequency Response: 50 Hz to 30 kHz (± 1.5 dB)
THD+N: < 0.05% (50 dB gain)
Residual Noise ON: < -70 dB (below to +4 dBu; 150 Ω source @ 50 dB gain)
OFF Attenuation: > 100 dB (1 kHz) > 80 dB (50 Hz to 20 kHz)
Switch Control Input: Connect to ground to activate signal; 0.5 mA maximum current required
Switching Time: < 5 ms (soft-switching transition on or off)
CMRR: >50 dB (50 Hz to 20 kHz)
Phantom Power Input: 24 Vdc @ 10 mA maximum
Ambient Operating Environment: 0° C to 55° C
Power Requirement: GROUND-REFERENCED, 24 Vdc @ 25 mA
Dimensions: Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in. (3.9 cm)