CH 3/4 INPUT SELECT
Pushing this button “IN” selects the 2 channel mode, meaning that channels
3/4 use the channel 1/2 inputs. Leaving this button “OUT” uses the channel 3/4
input in 4 channel mode.
GAIN BYPASS SELECT
Pushing this button “IN” bypasses the gain stage on the amplifier. This is used
in systems with a pre-amp section before the amplifier or to slave the amp to
a master amplifier. Leaving this button “OUT” is the default and uses the
amplifiers gains as a normal input level match.
CH 3/4 MONO SELECT
Pushing this button “IN” combines the input signal to create a mono signal of
channels 3/4 for use with subwoofer systems. Leaving the button “OUT”
defaults the amp to normal stereo mode.
HIGHPASS FREQUENCY
Turning this control sets the Highpass crossover point from 15 Hz (fully
counterclockwise) to 1.5 kHz (fully clockwise). This can be used as a subsonic
filter if needed.
HIGHPASS ON/OFF
Pushing this button “IN” engages the Highpass filter. Pushing this button
“OUT” will bypass the filter.
HIGHPASS X 10 SELECT
Pushing this button “IN” multiplies the highpass crossover frequencies times
10, 1.5 kHz to 15 kHz. Leaving the button “OUT” uses the highpass filter
normally. (see highpass frequency section above for frequency points)
LOWPASS FREQUENCY
Turning this control sets the Lowpass crossover point from 50Hz (fully
counterclockwise) to 5kHz (fully clockwise).
LOWPASS ON/OFF
Pushing this button “IN” engages the Lowpass filter. Pushing this button
“OUT” will bypass the filter.
CROSSOVER FREQUENCY DIAGRAMS
Highpass (x10)
Lowpass
5 kHz
50 Hz
350 Hz
70 Hz
90 Hz
120 Hz
200 Hz
800 Hz
1000 Hz
2200 Hz
3300 Hz
11:00
10:00
9:00
8:00
12:00
1:00
2:00
3:00
4:00
(15 kHz)
(1.5 kHz)
757.5 Hz
(2.9 kHz)
(4.2 kHz)
(5.6 kHz)
(6.9 kHz)
(9.6 kHz)
(11 kHz)
(12.3 kHz)
(13.7 kHz)
11:00
10:00
9:00
8:00
12:00
1:00
2:00
3:00
4:00
1.5 kHz
15 Hz
1.4 kHz
163.5 Hz
1.2 kHz
312 Hz
(8.3 kHz)
460.5 Hz
609 Hz
906 Hz
1.1 kHz
9 Diamond Audio Technology
