2 Channel Amplifier - Speaker- & RCA-Connection
GTR420.2 – GTR620.2
16
Connect RCA cable
from head-unit with
RCA input INPUT).
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 (SPEAKER OUTPUT + L - und + R -) 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.
•
•
•
•
X-OVER - Switch & Control
•
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
• 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 - Control
• Turn the BASS BOOST - Control into “0dB” - position.
BASS REMOTE
• In this configuration the BASS REMOTE is not in use.
2-Channel-Mode: 2 Speakers / Stereo
Caution
Please avoid to connect speaker (-) to the ground or vehicle chassis.
Speakers (Right) 2 - 8 Ohms
Speakers (Left) 2 - 8 Ohms
O
UT
PU
T
O
UT
PU
T
LL
RR
IN
PU
T
IN
PU
T
LL
RR
PO
W
ER
PO
W
ER
PR
OT
EC
T
PR
OT
EC
T
BA
SS
R
EM
OT
E
BA
SS
R
EM
OT
E
HPHP
LP
/BP
LP
/BP
FU
LL
FU
LL
X-O
VE
R
X-O
VE
R
BP
F
BP
F
4V4V
30H
z
30H
z1
50H
z
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
FU
SE
BR
ID
GE
D
SP
EA
KE
R
OU
TP
UT
GN
D
RE
M
12
V
PO
W
ER
IN
PU
T
L
R
