Denon AVR-3805

D E N O N E L E C T R O N I C S ( U S A ) , L L C
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2
Microphone Amplifier Gain Setting using Sound Level Meter and RMS Volt Meter
First you will need to adjust the “microphone amplifier gain”.
• Connect all the speakers and the video monitor (for the on-screen display) with the
AVR-3805
• Connect the microphone with the microphone amplifier
• Turn on the AVR-3805 and the “microphone amplifier”
• Turn on the “Phantom Supply” on the microphone amplifier
AVR3805
MIC AMP
with
mic power
supply
ex:
mixer amp
Speaker
120 mVrms
Measure the Sound
Pressure Level
with SPL meter at the
Microphone point.
Adjust AVR volume
SPL
meter = 80dB(c)
Use the internal test
tones for mic amp
calibration.
Measure the output level
and adjust the mic amp
gain to 120m V rms using
a RMS volt meter.
Microphone