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.
19
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.
•
•
•
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
Connect RCA outputs
from head-unit with
RCA inputs (LINE
INPUT CH1/2 & CH3/4).
S
E
KE
P
A
R
OU
TP
UT
FU
SE
BR
ID
EDG
L
R
GN
D
RE
M
2V1
W
E
PO
R
P
IN
UT
BR
ID
GE
D
L
R
Frontspeakers 2 - 8 Ohm
Rearspeakers 2 - 8 Ohm
