AEA 500 Series, Руководство пользователя, Страница: 6 / 12

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FRONT PANEL GUIDE
Audio Signal Level Indicators:
The green LED snaps on at -20 dBu to indicate the presence of
signal.
The yellow LED snaps on at 0 dBu.
The red LED snaps on at +20 dBu to warn of approaching
signal overload.
High Pass Filter (HPF):
3-position switch provides a gentle 6 dB per octave with choice
of -3 dB points at 115 Hz or 230 Hz.
Polarity Invert Switch:
OUT is normal; IN is inverted.
The green LED near the switch indicates inverted polarity.
Phantom Power (P48) Switch:
OUT is off and increases the preamp's input impedance to
100,000 Ohms.
IN ramps up full-spec P48 phantom power to the input, which
reduces the input impedance to 11,900 Ohms.
The red LED near the switch indicates when P48 phantom
power is engaged.
Mic Gain Rotary Switch:
12-position precision switch adjusts gain from +7 dB to +65 dB.
Output Stage Gain Control:
A potentiometer varies gain from 0 dB to +20 dB.
Full Counterclockwise = 0 dB (unity) gain.
Full Clockwise = +20 dB gain.
9 o’clock is ~+3 dB, 12 o’clock is ~+7 dB, 3 o’clock is ~+17 dB.
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