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.
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
Operating Temperature (Maximum):
131 F
Operating Temperature (Minimum):
32 F
Inputs:
500 ohm balanced; 5 k ohm unbalanced
Phantom:
24Vdc; IEC 1938: 1996-12, Filtered
Line Level:
+4 dBu 150 ohm balanced
Mic Level:
-45 dBu 150 ohm balanced
Headroom:
> 20 dB
Line Level Output:
Adjustable 35 to 65 dB
Mic Level Output:
Adjustable -15 to 15 dB
Frequency Response:
50 to 20000 Hz (+/-1 dB)
THD+N:
< 0.05 % (50 d gain)
Residual Noise ON:
< -70 dB (below to +4 dBu; 150 ohm 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 to 33 VDC @ 10 mA maximum
Power Requirement:
24 to 33 Vdc @ 25 mA
EZ-MPA1
- Microphone Preamplifier - Stereo Output with Compressors
EZ-MPA2
- Dual Microphone Preamplifier - Stereo Output with Compressors
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