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GND
POWER
Connect the INPUT RCA jacks of the included wire harness with the head unit by using appropriate audio signal cables. Make
6
sure that the INPUT LEVEL push-button (# 7) is in the LOW position (not pushed)
If your head unit does not have RCA preamp outputs, you can use the amplifier's high level inputs as signal input. Make sure that
the INPUT LEVEL push-button (# 7) is in the HIGH position (pushed). Simply connect the loudspeaker cables of the head unit
to the enclosed wire harness as follows:
The OUTPUT RCA jacks of both wire harnesses provide a linear full-range audio signal for driving additional amplifiers.
The INPUT LEVEL push-button determines whether the signal inputs are to be operated with a low level signal or a high level
7
signal.
If your head unit does not have a turn-on signal (REM), you can use the automatic turn-on function of the amplifier. This works
8
in two ways, which can be set at the AUTO TURN-ON switch:
DC: This method only works if you use the amplifier's HIGH LEVEL INPUT. The amplifier then detects a voltage rise to 6 volts
when the head unit is turned on by a so-called "DC offset" and then turns on the amplifier.
VOX: Select this method when using the INPUT RCA jacks. The amplifier then detects a voltage increase in the incoming audio
signal when switching on the head unit via the attached RCA cable and then switches on the amplifier.
Note: As soon as the head unit is switched off again, the amplifier switches itself off.
The terminal for the amplifier turn-on (page 15#2, REM IN/OUT) can now be used to supply additional amplifiers with a turn-on
signal. Simply connect the REM terminals of the two amplifiers and make sure that the other amplifier is in "normal" turn-on
mode, which means that the AUTO TURN ON function is disabled.
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FUNCTIONAL INSTRUCTIONS
OPERATING ELEMENTS
6
INPUT
OUTPUT
REM
L
R
L
R
+12V
IN/OUT
AUTO
TURN-ON
INPUT
QM400. 1
DC
VOX
8
7
10
12
INPUT
LEVEL
LEVEL
SUB
LOW
INPUT
SONIC
PASS
HIGH
LOW
MIN
MAX
10 Hz 40 Hz
50 Hz 5 kHz
OFF
REMOTE
9
11
INPUT CH4+
INPUT CH4-
OUTPUT L
OUTPUT R
14
16
POWER
PROTECT
BASS
PHASE
BOOST
SHIFT
SPEAKER
OUTPUT
0dB 18dB
0°
180°
INPUT L
13 15
INPUT R
OUTPUT L
OUTPUT R
INPUT L
INPUT R
OUTPUT L
SPEAKER OUTPUT +
SPEAKER OUTPUT +
OUTPUT R
SPEAKER OUTPUT -
SPEAKER OUTPUT -
SPEAKER OUTPUT +
SPEAKER OUTPUT +
INPUT L+
SPEAKER OUTPUT -
INPUT L-
SPEAKER OUTPUT -
INPUT R+
INPUT R-
OUTPUT L
OUTPUT R
INPUT L+
INPUT L-
INPUT R+
INPUT R-
OUTPUT L
OUTPUT R
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