User manual CLARION APX401-2

[. . . ] 2-CHANNEL POWER AMPLIFIER O P E R A T IO N INSTALLATION MANUAL 2 Channel Power System Amplifier TABLE OF CONTENTS Introduction . 16 INTRODUCTION The Clarion APX201. 2 and APX401. 2 are full-featured two-channel amplifiers incorporating the following features: · Full frequency response with low distortion and exceptional signal to noise performance. · Advanced circuitry design that features bridgeable and mixed mode operation for use in various audio systems, including those with satellite speakers and/or subwoofers. · Variable high-pass/low-pass electronic crossover with a 12dB per octave slope and full adjustable range (from 55Hz to 5. 5kHz) to aid in any audio system configuration. [. . . ] 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. 9 2 Channel Power System Amplifier 4. 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. Besure 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. Use a fuse rated to the total current consumption of the amplifier(s). Adding an external fuse will protect the electrical system from short circuits that can cause a fire. Refer to Figure 6 when making electrical connections. [. . . ] Solution Speakers wired incorrectly, which causes cancellation of bass frequencies. Check polarity of wires from amplifier to each speaker as defined by the system design. Problem Whining or ticking noise in the audio with engine on. Solution Amplifier is picking up alternator noise or radiated noise. [. . . ]