RDL STM-2X Switched Microphone Preamplifier

Switched Microphone Preamplifier - 35 to 65 dB Gain 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.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:24Vdc; IEC 1938: 1996-12, Filtered Outputs (2): Line Level:+4 dBu 150Ω balanced Mic Level:-45 dBu 150Ω balanced Headroom: > 20 dB Gain: Line Level Output:Adjustable 35 to 65 dB Mic Level Output:Adjustable -15 to 15 dB Frequency Response: 50 Hz to 20 kHz (+/-1 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:> 60 dB (50 Hz or 20 kHz) Phantom Power Input:24 Vdc @ 10 mA maximum Power Requirement: GROUND-REFERENCED, 24 Vdc @ 25 mA Ambient Operating Environment:0 C to 55 C