4
CONTROLS
The Impact HC amplifiers feature an extremely
flexible set of input and output controls
which permit the widest range of installation
opportunities. In order to ensure best
performance, any adjustment should be made
after the amplifier is installed and all input,
speaker and power connections are completed.
CONTROL PANELS
1. RCA LINE INPUT JACKS
It allows left and right inputs to be
connected to the amplifier using RCA plugs.
2. SUBSONIC FILTER FREQUENCY CONTROL
Adjust crossover frequency of the subsonic
filter only, from 10 Hz to 150 Hz.
3. LOW PASS FILTER FREQUENCY CONTROL
Adjust crossover frequency of the low pass
output only, from 40 Hz to 4.000 Hz.
4. STEREO/MONO SWITCH
When set in
MONO
mode, the low pass signal
is mono with a 24 dB/Oct crossover slope.
When set in
STEREO
mode, the low pass signal
is stereo with a 12 dB/Oct crossover slope.
5. AMPLIFIER X-OVER SELECT SWITCH
a.
LOW
position: crossover operates in low-
pass mode
b.
FULL
position: crossover off
c.
HI
position: crossover operates in high-pass
mode
6. HIGH PASS FILTER FREQUENCY CONTROL
Adjust the crossover frequency of the high pass
output only, from 10 Hz to 4.000 Hz.
7. INPUT LEVEL CONTROL
Provides input level adjustment from 200 mV
to 9 V.
8. BASS EQ CONTROL
Adjust the 45 Hz frequency output from + 0 to
+18 dB.
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