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Caution
Please avoid to connect speaker (-) to the ground or vehicle chassis.
2-Channel-Mode: 2 Subwoofers / Mono bridged
Cable connection
• Connect the INPUT of the amplifier to the head unit line output with a good quality RCA cable.
By connecting the RCA jacks OUTPUT with a additional amplifier, a full range signal will be
provided to the amplifier.
• Connect the subwoofers with the terminal block (CH1/2 + BRIDGED - SPEAKER OUTPUT
and CH3/4 + BRIDGED - SPEAKER OUTPUT ) of the amplifier.
• The minimum final subwoofer impedance must not be below 4 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.
TWIN SUB - Switch CH1/2
• The TWIN SUB - Switch must be set this configuration to "ON"-Position.
• The controllers for HIGH PASS, LOW PASS and BASS BOOST for CH1/2 are in this configuration not in use.
The parameters for HIGH PASS, LOW PASS and BASS BOOST for CH1/2 will be taken from CH3/4.
INPUT MODE - Switch
• The INPUT MODE - Switch must be set in this conguration to "2CH"-Position.
X-OVER - Switch & Control CH3/4
• See page 17.
LEVEL INPUT - Control
• See page 17.
BASS BOOST - CONTROL CH3/4
• The BASS BOOST - Control increases the bass level at 45 Hz from 0 up to 12dB. Please use the Bass-Boost carefully.
BASS REMOTE
• The BASS REMOTE allows to control the Bass-Level of Subwoofer 1 on CH1/2 and Subwoofer 2
on CH3/4 simultaniously for example from the driver's seat.
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
10Hz1 0Hz
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
S EAKE
RP
OUT
P
TU
F
U
S
E
BRI
EDD
G
L
R
GN
D
R
EM
1
2
V
WE
P
O
R
P
I
N
UT
B
R D
GE
I
D
L
R
Subwoofer 2
4 - 8 Ohm
Subwoofer 1
4 - 8 Ohm
BASS REMOTE
Connect RCA outputs
from head-unit with
RCA inputs (LINE
INPUT CH1/2).
4 Channel Amplifier - Speaker- & RCA-Connection
GTR440.4 – GTR640.4
20


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