AEA rpq500 Owner's Manual page 6

3 - High Frequency (HF) In switch:
OUT is true bypass; IN inserts the CurveShaper™ circuitry.
4 - Curve Frequency control:
This continuously variable control adjusts the +3dB break-frequency
from 2.5 kHz to 30 kHz.
5 - Low Frequency (LF) In switch:
OUT is bypass; IN inserts the -20dB low-cut shelving filter.
6 - Low Frequency Filter control:
This continuously variable control adjusts the -3dB break-frequency
of the filter from 22 Hz to 515 Hz; maximum LF reduction is -20dB.
7 - Phantom Power (P48) switch:
OUT is off; IN applies full-spec P48 phantom power to the input. The
red LED near the switch will indicate when P48 phantom power is
engaged.
8 - Mic/Line switch:
OUT is Mic Input mode; IN is Line Input mode which bypasses the
mic preamp stage to accomodate line-level signals. The green LED
near the switch will indicate when the Line Input mode is engaged.
9 - Polarity Invert switch:
OUT is normal; IN is inverted.
10 - Mic Gain rotary switch:
This twelve-position switch selects from +13dB to +62dB of
preamplifier gain.
11- Output Level control:
This continuously variable control provides up to +19dB additional
output gain in Mic Input Mode, following the optional CurveShaper™
circuitry. It acts as a fader and allows -60dB attenuation of the
output signal in the full counter clockwise position. One indicator tick
below the +6dB is the 0db unity position.
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