User manual CLARION APX401-4

[. . . ] 4-CHANNEL POWER AMPLIFIER O P E R A T IO N IN S T A L L A T IO N MANUAL 4 Channel Power System Amplifier TABLE OF CONTENTS Introduction . 16 INTRODUCTION The Clarion APX401. 4 is a full-featured four-channel amplifier incorporating the following features: · Full frequency response with low distortion and exceptional signal to noise performance. · Advanced circuitry design features bridgeable and mixed mode operations for use in a variety of 4, 3 or 2 channel audio systems. · Independent front and rear, low-pass or high-pass electronic crossovers each with a 12dB per octave slope and full adjustment range (from 55Hz to 550Hz Front and 55Hz to 5. 5kHz Rear) to aid in any audio system configuration. [. . . ] If you do not have the necessary skills, do not attempt to install the amplifier yourself. Instead, see your authorized Clarion dealer for installation recommendations. MOUNTING PRECAUTIONS Although the Clarion APX401. 4 incorporates heat sinks and protection circuits, mounting the amplifier in a tight space without any air movement can still damage internal circuitry over time. Choose a site that provides adequate ventilation around the amplifier. For easy system set-up, mount the amplifier so the front panel controls can be accessible after installation. In addition, observe the following precautions: 1. For the most efficient cooling, mount the amplifier so cool air runs along the length of the fins rather than across them. Remember, any moving air will dissipate heat. Avoid mounting to subwoofer enclosures or areas prone to vibration. Do not install the amplifier on plastic or other combustible materials. Prior to drilling, make sure proposed mounting holes will not cut into the fuel tank, fuel lines, brake lines (under chassis), or electrical wiring. WIRING PRECAUTIONS Read all wiring precautions. If you are not sure of the connections, contact your authorized Clarion dealer. Before installation, make sure the source unit Power switch is in the OFF position. Disconnect the negative (-) lead of the battery before making any power connections. When making connections, be sure that each connection is clean and secure. Insulate final connections with electrical tape or shrink tubing. Failure to do so may damage your equipment. A secure, clean ground connection is critical to the performance of your Clarion amplifier. Use the shortest ground wire possible and securely connect to the car chassis to minimize resistance and avoid noise problems. Be sure to clean off any paint, prior to making this connection. Add an external fuse on the amplifier's positive (+) power lead and connect it as close as possible to the vehicle's (+) battery terminal. [. . . ] frozen cone, burning smell, etc. ) 14 Owner's Manual Problem Amplifier fuse keeps blowing. Solution Incorrect wiring or short circuit. Review Installation and check all wiring connections. Problem Whining or ticking noise in the audio with engine on. Solution Amplifier is picking up alternator noise or radiated noise. [. . . ]