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Caution
Please avoid to connect speaker (-) to the ground or vehicle chassis.
3-Channel-Mode: 2 Speakers/Stereo & 1 Subwoofer / Mono bridged
Cable connection
• Connect the INPUT of the amplifier to the head unit line output with good quality RCA cables.
By connecting the RCA jacks OUTPUT with a additional amplifier, a full range signal will be
provided to the amplifier.
• Connect the speakers with the terminal block (CH1 +/- & CH2 +/ - SPEAKER OUTPUT and
the subwoofer with CH3/4 + BRIDGED - SPEAKER OUTPUT) of the amplifier.
• The minimum final speaker impedance must not be below 2 Ohm per channel and 4 Ohm
(Subwoofer) per channelpair. Too low speaker loads result in too high heat dissipation and
may cause the amplifier run into protection.
• Please observe speaker channel and polarity as printed by the speaker terminal block.
Incorrect phasing of the speakers results in total loss of bass response.
X-OVER Switch & Control (Front- or Rearspeakers on CH1/2)
See page 19.
X-OVER Switch & Control (Subwoofer on CH3/4)
See page 17.
INPUT LEVEL - Control (CH1/2 & CH3/4)
See page 19.
TWIN SUB - Switch CH1/2
The TWIN SUB - Switch must be set in this configuration to "OFF" - Position.
BASS BOOST - Control (Subwoofer on CH3/4)
• The BASS BOOST - Control adjusts the bass level at 45 Hz from 0dB up to 12dB. Caution! Please use the Bass-Boost carefully.
INPUT MODE - Switch
• The INPUT MODE - Switch must be in “2CH” - position (if LINE INPUT is occupied only on CH1/2) or to "4CH" - position (if LINE INPUT
is occupied on all four jacks).
CH3CH3
LINE INPUT LINE INPUT
OUTPUT OUTPUT
LL
RR
LINELINE
BASS REMOTEBASS REMOTE
CH1CH1
CH4CH4
CH2CH2
PROTECTPROTECT PWRPWR
BPFBPF
4V4V
30Hz3 0Hz
150Hz150Hz
0dB0dB 12dB12dB
BASS B OOSTBASS B OOST
0.2V0.2V
1.2kHz1.2kHz
10Hz10Hz
HIGH P ASSHIGH P ASSLOW P ASSLOW P ASS
LEVEL I NPUTLEVEL I NPUT
BPFBPF
4V4V
30Hz30Hz
150Hz150Hz
0dB0dB 12dB12dB
0.2V0.2V
1.2kHz1.2kHz
10Hz10Hz
4CH4CH 2CH2CH
INPUTINPUT MODEMODE
OFFOFF ONON
TWIN TWIN SUBSUB
BASS B OOSTBASS B OOST
HIGH P ASSHIGH P ASSLOW P ASSLOW P ASS
LEVEL I NPUTLEVEL I NPUT
CH3 / CH4CH3 / CH4
CH1 / CH2CH1 / CH2
X- O VERX- O VER
LP/BPLP/BP HPHP FULLFULL
X- O VERX- O VER
LP/BPLP/BP HPHP
FULLFULL
SPEAKER
O TPU UT
FUSE
BRI EDDG
L R
GND REM 12V
OWEP R
IPNUT
BRIDGED
L
R
Subwoofer
4 - 8 Ohm
Speakers 2 - 8 Ohm
BASS REMOTE
Connect RCA outputs from
head-unit with RCA inputs
(LINE INPUT CH1/2 and CH3/4).
4 Channel Amplifier - Speaker- & RCA-Connection
GTR440.4 – GTR640.4
21


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