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LA680/1080
Features and Controls
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Protection LED Indicator
The protection circuitry in the amp will disable it if it
senses an input overload, speaker short circuit, or
thermal overload conditions. Should this occur, the
PROTECT LED will be illuminated. At that time, it is
important thatyou checkto determinewhat hascaused
the protection circuitry to become activated.
If the amp shut off because of a thermal overload,
allow it to cool down before attempting to restart.
If the shutdownoccured because ofan input overload,
or speaker short circuit, be sure to correct these
conditions before attempting to restart the amp.
To reset the amp, turn the REMOTE power off and on
again.
Power LED Indicator
This LED is illuminated when the REMOTE ON
system is turned on.
This unit is provided with gold-plated RCA input
jacks. Using RCA-RCA type patch cords, connect
these inputs to the RCA outputs from your head
unit.
Low Level Input (High Impedance)
High Level Input (Low Impedance)
Use these if your car stereo does not have
RCA output jacks:connect the speakeroutput from
the head unit to these inputs
Permits you to adjust the crossover frequency from
80 Hz to 2.5 kHz to suit the tweeters
High Pass Control
Permits you to adjust the crossover frequency from 35
Hz to 400 Hz to suit the subwoofers
Low Pass Control
Allows you to increasethe bass signal level sent to the
speakers
Bass Boost Control
In a full range system, set this to FULL. If the amp is
being used to power a crossover system, set to either
HPF or LPF as needed.
Crossover Mode Switch
Input Level Control
Use this control to match the output of the head unit
to the amplifier. If distortion is present, reduce the
setting of this control.
Power Supply Terminals
Protects theamplifier as wellas the automobile electrical
system from short circuit conditions.
Fuse
These terminalsare 14KGold platedfor high conductivity
and minimum impedance loss. The terminals face
upwards for easy wiring in tight situations.
Speaker Terminals
Remote Bass Boost
Plug in the Remote Bass Boost Control wire in here.
GND
REM
F
U
SE
12
V
0
BASS
BOOST LPF
FULL
LPF
HPF
CH
4
CH
3
CH
3
LOW IN
CH
4
HI IN
FREQ. HPF
18db 80 2.5k
H
2
35 400
H
2
80 2.5k
H
2
35 400
H
2
0 18db
BASS
BOOSTLPFHPFLEVEL
MIN MAX
FULL
LPF
FREQ. LEVEL
MIN MAX
HPF
CH
1
LOW IN
CH
2
CH
2
CH
1
HI IN
POWERPROTECT
REMOTE
BASS BOOSTCH
3/4
GNDGND
REMREM
FU
U
SEFUSE
12
V
12
V
CH
4
CH
4
+ –
CH
2
+–
CH
1
+–
CH
3
+–
BRIDGED
+
–
BRIDGEDBRIDGED
+
–
2
3
1
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5
4
10
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