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Anleitung Zusammenfassung
• Pulse-Width Modulated (PWM) MOSFET power supply for maximum performance with minimal distortion. • Remote turn-on with "soft start" muting to prevent turn-on "thump". • Advanced circuitry design featuring bridgeable and mixed mode operation for use in various system configurations including 4, 3, or 2 channel systems. • Variable high-pass/low-pass electronic crossover with a 12dB per octave slope (adjustable range: 55Hz to 5.5kHz). • Variable bass boost circuit to reinforce low frequency signals that may be lost due to subwoofer enclosure design. • Adjustable input level controls with ground loop isolation to minimize noise and distortion. • 2-ohm stereo stable, 4-ohm mono stable. • Gold-plated power, speaker, and RCA connectors. • Speaker level input. • Low profile construction with aluminum heat sink for efficient heat dissipation. ABOUT THE MANUAL AND WARRANTY This manual describes the basic requirements to install the Clarion APX480M amplifier. The installation of this amplifier can be quite complex to install, if you do not posses the necessary knowledge and tools to perform this installation, please contact your local Clarion dealer. Keep all instructions and sales receipt for future reference and warranty information. Warranty information can be found on page 11 of this manual. TABLE OF CONTENTS Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Input Connections and Audio Controls . . . . . . . . . . . . . .1 Connections for Power and Speakers . . . . . . . . . . . . . . .3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Mounting Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Wiring Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Wiring and Applications . . . . . . . . . . . . . . . . . . . . . . . . .5 Setting the Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Setting the Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Setting the Bass Boost . . . . . . . . . . . . . . . . . . . . . . . . . .10 Final System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Product Specs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Clarion Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . .13 APX480M manual.qxd 3/12/2004 1:07 PM Page 3 Owner’s Manual DESCRIPTION The APX480M uses an unregulated MOSFET power supply for superior sound and output wattage. In addition, a toroid-coil is used to transfer power with minimal performance loss due to heat. To avoid unwanted noise, a double-sided conformal printed circuit board with strategically placed components keeps AM RFI subdued. All of the connections and controls for the APX480M are conveniently located at the ends of the amplifier and labeled appropriately. To ensure the best possible electrical connections, the power, speaker, and RCA inputs are gold-plated. An additional benefit of this amplifier is the ability to create a 2, 3, or 4 channel amplified system with a flip of a switch (see Application section). In the event of component failure or a short circuit, the APX480M incorporates safe guards and an outboard ATC fuse to prevent damage to the amplifier INPUT CONNECTIONS AND AUDIO CONTROLs The front panel of the APX480M contains both connections for RCA and speaker level inputs, along with the audio controls as shown below. Figure 1- 1. Front RCA Input Jacks 2. Rear RCA Input Jacks 3. Front Gain Control 4. Rear Gain Control 5. Bass Boost Control 6. Rear Channel Input Selector 7. Front Mode Switch 8. Rear Mode Switch 9. Speaker Level Inputs 10. Front Frequency Control 11. Front X-Over Mode Switch 12. Rear Frequency Control 13. Rear Multiplier Switch 14. Rear X-Over Mode Switch 1 APX480M manual.qxd 3/12/2004 1:07 PM Page 4 APX480M Power System Amplifier The Input Connections are gold-plated RCA Jacks and are labeled as FRONT RIGHT, FRONT LEFT, REAR RIGHT and REAR LEFT. The Gain Controls provide a wide adjustment range to accommodate output levels from any brand of source unit. • Gain Controls - Seperate Front and Rear Gain Controls allow you to set the nominal operating level of the amplifier. The amplifier’s range, 250mV to 2.5V for RCA inputs or 500mV to 5V for speaker level inputs, can accommodate input levels from virtually any brand of source unit. • Bass Boost Control - The amplifier also features a “high-Q” (i.e. narrow frequency band) Bass Boost circuit. It acts much like an equalizer, with adjustable gain (from 0 to +18dB) fixed at 45Hz. Use this feature to tune low- frequency audio response to compensate for a less than ideal subwoofer enclosure design. The added boost produces rich, full bass tones that are normally difficult to reproduce in the car audio environment. NOTE: If Bass Boost is undesired, set Bass Boost to 0dB. High-pass/Low-pass Filter Controls • Freq (Hz) Controls ...