20
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.
CH
3
CH
3
LIN
E IN
PU
T
LIN
E IN
PU
T
O
UT
PU
T
O
UT
PU
T
LL
RR
LIN
E
LIN
E
BA
SS
R
EM
OT
E
BA
SS
R
EM
OT
E
CH
1
CH
1
CH
4
CH
4
CH
2
CH
2
PR
OT
EC
T
PR
OT
EC
T
PW
R
PW
R
BP
F
BP
F
4V4V
30H
z
30H
z
150
Hz
150
Hz
0d
B
0d
B
12d
B
12d
B
BA
SS
B O
OS
T
BA
SS
B O
OS
T
0.2
V
0.2
V
1.2
kH
z
1.2
kH
z
10H
z
10H
z
HIG
H P
AS
S
HIG
H P
AS
S
LO
W
P A
SS
LO
W
P A
SS
LE
VE
L I N
PU
T
LE
VE
L I N
PU
T
BP
F
BP
F
4V4V
30H
z
30H
z
150
Hz
150
Hz
0d
B
0d
B
12d
B
12d
B
0.2
V
0.2
V
1.2
kH
z
1.2
kH
z
10H
z
10H
z
4C
H
4C
H
2C
H
2C
H
INP
UT
INP
UT
MO
DE
MO
DE
OF
F
OF
F
ONON
TW
IN
TW
IN S
UB
SU
B
BA
SS
B O
OS
T
BA
SS
B O
OS
T
HIG
H P
AS
S
HIG
H P
AS
S
LO
W
P A
SS
LO
W
P A
SS
LE
VE
L I N
PU
T
LE
VE
L I N
PU
T
CH3 / CH4
CH3 / CH4
CH1 / CH2
CH1 / CH2
X- O
VE
R
X- O
VE
R
LP
/BP
LP
/BP
HPHP
FU
LL
FU
LL
X- O
VE
R
X- O
VE
R
LP
/BP
LP
/BP
HPHP
FU
LL
FU
LL
S
EA
KE
R
P
OU
TP
TU
FU
SE
BR
I
ED
DG
L
R
GN
D
RE
M
12
V
W
E
PO
R
P
IN
UT
BR
DG
E
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
