AEA 500 Series, Руководство пользователя

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9
First Stage GAIN Control Adjustment
Connect the microphone and then, if needed, turn on phantom
power. Have the performer(s) play a louder section and click up the
GAIN (ref.#5) until the yellow LED usually lights and the red LED
rarely lights. The control uses ultra-low noise and high precision
resistors with gold-plated 12-position switches made in the USA.
We’ve used them for 37 years without a failure.
Second Stage OUTPUT Gain Trim
The OUTPUT Control (ref. #6) potentiometer adjusts gain from 0 dB
(unity gain) at the bottom to +20 dB gain when fully turned up. Like
the 12-step GAIN control, the 0 dB and +20 dB OUTPUT positions
are accurate and repeatable. To reset to an in-between position,
mark it during the session. Approximate OUTPUT gain at 9, 12, and
3 o’clock are +3 dB, +7 dB, and +17 dB. The red LED lights 8 dB
before clipping with a balanced load, so listen carefully to see how
it sounds when the red LED lights up more often.
During rehearsal, check the input level adjustment for your DAW,
console, or audio recording device. If the red LED is illuminated
too often or too long, reduce the Mic GAIN one step at a time until
the red LED illuminates briefly on the loudest peaks. If the red LED
occasionally flashes while recording, this does not necessarily mean
that the preamp is clipping.
The energy and excitement generated during a performance
guarantees it will be louder than the rehearsal. After setting the
GAIN during sound-check, operators might want to reset the GAIN
control one or two clicks lower for the actual performance. When
needed, this GAIN decrease can be added back in by turning the
OUTPUT knob up.