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Wiring
Power and Outputs
CAT31
Power terminal ( +24V)
+12V REM GND
Remote terminal ( REM )
For RCA cable signal input:
Connect the radio power antenna lead = remote turn
on/off from the car stereo to the amplifier remote
connection. This turns on the amplifier whenever
the car stereo is turned on.
You can either use the built in remote cable in the
RCA cable itself or use a separate cable.
Sometimes a small disturbance may enter the
amplifier coming from the remote voltage , through
the built in remote wire and into the RCA cable. Thus
we recommend to use a separate remote wire and
run the RCA lead separate from remote wire, power
cables and speaker cables.
You can either use a crimp fork terminal or insert
the cable directly into the amplifier terminal. If there
is no remote voltage available from the stereo, you
must connect to the ignition key through the radio
or any accessories fuse.
4
DLS
DLS FH 1B
fuse holder
Connect to a good chassis ground. The ground
connection should be clean, unpainted metal to prov-
ide a good electrical connection. Use a wire brush, a
scraper or a piece of an abrasive sheet to clean the
metal. Use a lock washer or two to secure contact.
Protect with silicon grease or by paint applied
afterwards.
+12V REM GND
+12V REM GND
Power Light / Protect light
The power light (green ) comes on when
the amplifier is turned on.
The protect light ( red ) comes on when
the amplifier shuts down from
overheating or short circuit.
Fuses
Use only 20 ampere ATC blade
type fuses. CAT31 uses two 20
ampere fuses.
20A
For High Level input:
We recommend you to connect the remote wire as
described above.
The amplifier will be turned on/ turned off by the
high level input voltage. This is done when the Hi
level/Low level switch is set to Hi level position.
There is a small disadvantage that this function
gives soft turn on operation but some plop sound
when switching off.
You do not have to connect any remote voltage
when using Hi level input.
Connect the fuse holder as close to the vehicle
battery + as possible, using AWG7 = 10 mm
2
or
heavier cable. Use ring crimp terminal cable to
connect to battery +. Apply silicon grease to the
fuse to prevent corrosion.
The fuse value depends on the
size of the power cable.
A 16 mm
2
cable can have a
60A fuse.
Connect the battery cable to the +24 Volt terminal
on the amplifier.
Be sure to use a rubber grommet or a plastic
insulating tube where the cable passes the firewall
or other places when it can easily be jammed.
Use wire ties to secure to existing cables in the engine
room. If you buy another power cable than the
recommended, use the follwing maximum fuse
values.
Max. fuse value for different cable sizes:
6 mm
2
(9 AWG) :25 A 10 mm
2
(7AWG) :40 A
16 mm
2
(5AWG) :60 A 21 mm
2
(4AWG) :100 A
33 mm
2
(2AWG) :150 A 42 mm
2
(1AWG) :200 A
+24V REM GND
+24V REM GND
+24V REM GND
Protect
(Red)
Power
(Green)
Ground Terminal ( GND )
4


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