Filter
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LL
RR
10
QS4150 & QS4250 CONNECTIONS (3 CHANNEL MODE)
BASS
LEVEL
ch3
R
L
ch1
ch2
ch3-4
ch1-2
LINE INPUT
ch4
+ - GND - +
+ - GND - +
HI
INPUT
OUTPUT
5v
5v
.2v
.2v
0dB 60Hz 30Hz
60Hz
1.2KHz
1.2KHz
0dB
12dB
12dB
HPF
LPF
MODE
X-OVER
full
full
hpf
hpf
lpf
lpf
2 3 4
EQ
30Hz250Hz
250Hz
BRIDGED
CH1-2 SPEAKER OUTPUT
GND REM
+12V
CH3-4 SPEAKER OUTPUT
POWER
PROTECT
POWER INPUT
FUSE
BRIDGED
L
L
R R
4 Ohm Speakers
(2 Ohm Minimum)
4 Ohm Speakers
(2 Ohm Minimum)
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++
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4 Ohm Speaker4 Ohm Speaker
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LL
RR
Optional full range line out connection
to additional amplifiers in the system.
LL
RR
Adjust the
to desired crossover point for your speakers
HPF (High Pass Frequency)
Adjust the L
to desired crossover point for your subwoofer
PF (Low Pass Frequency)
Set the “MODE” switch
to the 3 channel position.
In this example we have selected
HPF (High Pass Filter) for our front channels.
In this example we have selected
LPF (Low Pass Filter) for our bridged channel.
**CAUTION! In the bridged mode, the amplifier must see a 4 Ohm load or higher. Any
lower than 4 Ohms will cause the amplifier to overheat and possibly cause permanent damage
to the amplifier!