Clarion APX2120 owner manual Wiring precautions, Improper connections may damage the equipment

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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, break 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 high- quality 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 output 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.

English

APX2120/APX4240/APX1300

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AMPSOwnersManual.pmd

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2005-12-13, 17:02

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Contents APX2120 APX4240 APX1300 FCC Approval EnglishContents Features Installation PrecautionsControls Connecting a source unit without RCA outputs Setting the operating levelOperations Improving bass soundCare and maintenance Installation and WiringWhat is included in the box Mounting precautionsImproper connections may damage the equipment Wiring precautionsPower and speaker connections Mono subwoofer system ApplicationsSubwoofer system Four-channel stereo system Two-channel high power system Setting the gainSetting the crossover Setting the bass boostFinal system checks No Audio Whining or ticking noise when engine onAudio cycles on and off Distorted audioGlossary Limited Warranty Information APX2120/APX4240/APX1300 Clarion Corporation of America