RDL STM-2X Switched Microphone Preamplifier - 35 to 65 dB gain

Radio Design Labs STM-2X Switched Microphone Preamplifier - 35 to 65 dB gain

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

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.

• 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)
• Package Type: Cardboard Box