Switched Mic Preamp - 35 to 65 dB Gain

• Operating Temperature (Maximum): 55 C
• Operating Temperature (Minimum): 0 C
• 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

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