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Clarion APX2121 Manual

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• Mount the amplifier on a rigid surface away from subwoofer enclosures or to any
area that is prone to vibration. Do not install the amplifier on plastic or on any
other combustible material.
• For easy system setup, mount the amplifier so that the front panel controls are
accessible after installation.
• Always use great care when attaching anything to a vehicle! Check clearances on
all sides of the planned installation before drilling any holes or installing any
screws.
• Make sure the holes you drill will not cut into the fuel tank, fuel lines, brake lines
(under the chassis) or electrical wiring.
Wiring precautions
Read all wiring precautions. If you are not sure of the connections, contact your
authorized Clarion dealer.
• Before you start, make sure the source unit’s power switch is off.
WARNING!
To prevent short circuits during installation, disconnect the
vehicle’s negative (-) battery lead before making any power
connections.
• Extra cable can cause signal loss and act as an antenna for noise. Use only
highquality RCA cables that are no longer than necessary to make a direct
connection with the source unit and amplifiers.
• Make sure each connection is clean and secure. Insulate final connections with
electrical tape or shrink tubing.
CAUTION!
Improper connections may damage the equipment.
• When routing RCA cables, keep the cables away from the power cables and out
put speaker wires.
• A good chassis ground connection is critical to minimize resistance and avoid
noise problems. Use the shortest wire possible. Clean off any paint prior to making
connections. Securely connect the ground wire to the car chassis and the source
unit ground.
• Add an external fuse to the amp’s positive (+) power lead and connect it as close
as possible to the vehicle’s plus (+) battery terminal. Use a fuse rated to the total
current consumption of the amplifier. Adding an external fuse protects the
electrical system from short circuits that can result in a fire.
• Do not open the case. There are no user-serviceable parts inside. If you require
assistance, consult your Clarion dealer or an authorized Clarion service center.
apx2121_4241_1301.qxd 2/6/2008 11:57 AM Page 9
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