18
AMPLIFIER MOUNTING
Attention! For your own safety, disconnect the positive battery terminal (+12V)
or remove the main fuse of the 12V power cable, before you start any wiring
work!
Once the location where the amplifier will be mounted is found, use the unit as a
template and mark the mounting holes with pencil or felt-tip marker. Pilot-drill the
these holes, using a 2,5mm or 3mm drill bit on your power drill. Insert the supplied
rubber washers into the mounting holes of the amp. This amplifier must be moun-
ted isolated from the vehicle's chassis ground. Bolt the unit in place with the sup-
plied self tapping screws.
Important! The amplifier, or parts of it must never touch or have contact with metal
parts of the vehicle, since electrical ground-loops always result in loud hum noise!
CABLE ROUTING
RCA INTERCONNECTS AND REMOTE WIRING
Run the RCA interconnects and the remote lead from the head-unit to the amplifier.
Note that RCA interconnects must be routed completely separate from the main
power cable. Connect the remote (turn on/turn off) lead to the REM input terminal
of the amplifier and to the remote output lead of your head-unit. Now you can plug
in the RCA interconnects to the line outputs of your head-unit and to the RCA
inputs of the amplifier. Pay attention when connecting the RCA cables to the amp:
The left line out must be connected to 1CH input, the right line out must be connec-
ted to 2CH input.
For the SPECTRON amplifier model SPA4200, you should now set the input mode
selector switch to the corresponding position. Choose 2-CH when the amplifier is
fed with one stereo RCA interconnect - or set the slide switch to its 4-CH position
if the amp is driven by two pairs of RCA interconnects.
LOUDSPEAKER WIRE ROUTING
Once the speaker cables have been routed, turn loose the speaker terminal screws
and - after inserting the stripped speaker cables - re-tighten the screws. Always
maintain correct polarity ("+" to "+"; "-" to "-").
MAIN POWER CABLES
Run the positive main power cable ("+12 V") directly from the positive terminal of
the car battery to the amplifier. For protection of your car audio system against
electrical short cuts and fire hazards, you must insert a fuse holder within the first
30cm of the positive main power cable. The applicable fuse value must be matched
to the limitations of your main power cable cross section!
Connect the ground cable to the ground terminal input of your amplifier and to a
rust free ground point in your vehicle. Keep the ground cable ("-12V") as short as
possible. The ground power cable must have the same cross-section as the posi-
tive power cable.
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