STM-3 - Stick-On Series Single Channel, High-Gain Microphone Preamplifier with Dual Outputs

• The STM-3 is a quality low-noise microphone preamplifier designed for use in surveillance,

Input: 500 balanced; 5 k unbalancedPhantom:24Vdc; IEC 1938: 1996-12, Filtered Output (2): +4 dBu 150 balanced; -10 dBV unbalancedFrequency Response: 50 Hz to 25 kHz (+/- 1 dB)Gain: Adjustable 45 to 75 dBTHD+N: <0.05% (50 dB gain)CMRR: 60 dB (50 Hz to 20 kHz)Residual Noise:<-70 dB (below +4 dBu, 150 source)Headroom: 20 dB (24 Vdc supply); 14 dB (12 Vdc supply)Phantom Power Input:24 to 33 Vdc @ 10 mA maximumPower Requirement: GROUND-REFERENCED, 24 to 33 Vdc @ 25 mAAmbient Operating Environment:0 C to 55 C