Polk Audio PA660.4 PA880 Owner's Manual - Page 9

Loose or poor audio input Loose power connections Distorted output Amplifier level sensitivity set too high exceeding maximum capability of amplifier Impedance load to amplifier too low Shorted speaker wires Speaker not connected to amplifier properly. Internal crossover not set properly for speakers Speakers are blown Poor bass response Speakers wired with wrong polarity causing cancellation at low frequencies. Poor bass response Crossover set incorrectly Impedance load at amplifier is too low. Check line level connections and repair or replace as needed. Check power wires and ground connections and repair or replace as needed. Readjust gain. Refer to the Adjusting the Sound of the System section of this manual for detailed instructions. Check speaker impedance load, if below 2 Ohm, rewire the speakers to achieve higher impedance. Check speaker wires and repair or replace as needed. Check speaker wires and repair or replace as needed. Refer to the Amplifier Settings section of this manual for detailed instructions Readjust crossovers. Refer to the Amplifier Settings section of this manual for detailed instructions. Check system with known working speakers and fix or replace as needed. Check speaker polarity and fix as needed. Reset crossovers. Refer to the Amplifier Settings section of this manual for detailed instructions. Check speaker impedance load if below 2 Ohm, rewire speakers to achieve higher impedance. Battery fuse blowing Short in power wire or incorrect wiring. Check power wires and ground connections and repair or replace as needed. Fuse used is smaller than recommended. Replace with proper fuse size. Actual current exceeds fuse rating. Check speaker impedance load if below 2 Ohm, rewire speakers to achieve higher impedance. Amplifier fuse blowing Fuse used is smaller than recommended. Replace with proper fuse size. Impedance load at amplifier is too low. Check speaker impedance load if below 2 Ohm, rewire speakers to achieve higher impedance. Speaker is blown with shorted outputs Check system with known working speakers and fix or replace as needed. Actual current exceeds fuse rating Check speaker impedance load if below 2 Ohm, rewire speakers to achieve higher impedance. 16 © 2010 Polk Audio-all rights reserved SPECIFICATIONS Amplifier Type Channels RMS Continuous Power @ 4 Ohm RMS Continuous Power @ 2 Ohm RMS Continuous Power Bridged @ 4 Ohm Dynamic Power @ 4 Ohm Dynamic Power @ 2 Ohm Dynamic Power Bridged @ 4 Ohm Dynamic Peak Power Distortion at Rated Power Externally Bridgeable Remote Gain Functions Remote Gain Control Included Minimum Impedance Bridged Minimum Impedance 1˜LÀˆ`}i` Signal-to-Noise Ratio Frequency Response Linear Bandwidth Damping Factor Crossover Filter Slope ­` ÉœVÌ>Ûi® Front Variable High-Pass Switch Front High Pass Filter Front Gain Control Rear High Pass Filter Rear Gain Control Crossover Switch Crossover Frequency Range Front Variable Bass Control Rear Variable Bass Control PA330 Bridgeable Class AB MOSFET 2/1 75W x 2 PA660 Bridgeable Class AB MOSFET 4/3/2 75W x 4 100W x 2 85W x 4 200W 150W x 2 150W x 2 200W x 2 300W 150W x 4 170W x 4 300W x 2 300W 100 12dB/octave n/a 9ià n/a ,>˜}i® n/a 250mV to 5V n/a n/a 250mV to 5V n/a 50Hz-500Hz n/a n/a 6>Àˆ>Li n` ® n/a 6>Àˆ>Li n` ® 6>Àˆ>Li n` ® PA880 Class AB MOSFET 1 300W x 1 500W x 1 na 500W x 1 800W x 1 n/a 800W 150 12dB/octave n/a n/a n/a n/a n/a 50Hz-500Hz n/a n/a © 2010 Polk Audio-all rights reserved 17