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4 Channel Amplifier - Speaker- & RCA-Connection
GTR440.4 – GTR640.4
X-OVER - Switch & Control CH1/2 and CH3/4
If larger than 20 cm speakers are used, the "FULL" position is recommended.
• For all smaller speakers (8.7cm - 16cm) the "HP"-Position (HIGH PASS) is recommended, which
eliminates the lowest frequencies and protects the speakers from damage. Set the crossover-frequency
between 10Hz - 1200Hz, depending on the size of the installed speakers. The Highpass adjustment can be
done with the HIGH PASS - Control. In this configuration the LOW PASS - Control is not in use.
LEVEL INPUT - Control CH1/2 and CH3/4
• Turn the LEVEL INPUT - Control on the amplifier to "4V" position.
• Turn the head unit volume control to about 80-90% of its full setting.
• Turn the LEVEL INPUT - Control clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT - Control slightly until you can hear clean sound.
BASS BOOST CH1/2 and CH3/4
• Turn the BASS BOOST - Control into “0dB” - position.
BASS REMOTE
• In this configuration the BASS REMOTE is not in use.
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Caution
Please avoid to connect speaker (-) to the ground or vehicle chassis.
4-Channel-Mode: 2 Frontspeakers / Stereo & 2 Rearspeakers /Stereo
Cable connection
• Connect 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 +/- und CH2 +/ - SPEAKER) and
(CH3 +/- und CH4 +/ - SPEAKER) of the amplifier.
• The minimum final speaker impedance must not be below 2 Ohm per channel. 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.
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
Connect RCA outputs
from head-unit with
RCA inputs (LINE
INPUT CH1/2 & CH3/4).
SEKEPA R OUTPUT
FUSE
BRID E DG
L R
GND REM 2V1
WEPO R
PIN UT
BRIDGED
L
R
Frontspeakers 2 - 8 Ohm
Rearspeakers 2 - 8 Ohm
19


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