Polk Audio PA330 manual Specifications, Distorted output, Poor bass response, Battery fuse blowing

Loose or poor audio input	Check line level connections and repair
	or replace as needed.
Loose power connections	Check power wires and ground connections
	and repair or replace as needed.
Distorted output
Amplifier level sensitivity set	Readjust gain. Refer to the Adjusting the Sound of the
too high exceeding maximum	System section of this manual for detailed instructions.
capability of amplifier
Impedance load to amplifier too low	Check speaker impedance load, if below 2 Ohm,
	rewire the speakers to achieve higher impedance.
Shorted speaker wires	Check speaker wires and repair or replace as needed.
Speaker not connected	Check speaker wires and repair or replace as needed.
to amplifier properly.	Refer to the Amplifier Settings section of this manual
	for detailed instructions
Internal crossover not	Readjust crossovers. Refer to the Amplifier Settings
set properly for speakers	section of this manual for detailed instructions.
Speakers are blown	Check system with known working speakers
	and fix or replace as needed.
Poor bass response
Speakers wired with wrong polarity	Check speaker polarity and fix as needed.
causing cancellation at low frequencies.
Poor bass response
Crossover set incorrectly	Reset crossovers. Refer to the Amplifier Settings
	section of this manual for detailed instructions.
Impedance load at amplifier is too low.	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.

SPECIFICATIONS

Amplifier	PA330	PA660	PA880
Type	Bridgeable Class AB	Bridgeable Class AB	Class AB MOSFET
	MOSFET	MOSFET
Channels	2/1	4/3/2	1
RMS Continuous Power	75W x 2	75W x 4	300W x 1
@ 4 Ohm
RMS Continuous Power	100W x 2	85W x 4	500W x 1
@ 2 Ohm
RMS Continuous Power	200W	150W x 2	na
Bridged @ 4 Ohm
Dynamic Power @ 4 Ohm	150W x 2	150W x 4	500W x 1
Dynamic Power @ 2 Ohm	200W x 2	170W x 4	800W x 1
Dynamic Power Bridged @	300W	300W x 2	n/a
4 Ohm
Dynamic Peak Power	300W	600W	800W
Distortion at Rated Power	<0.9%	<0.9%	<0.9%
Externally Bridgeable	No	No	9iÃ
Remote Gain Functions	No	No	9iÃ
Remote Gain Control Included	n/a	n/a	9iÃ
Minimum Impedance Bridged	4 Ohm	4 Ohm	4 Ohm
Minimum Impedance	2 Ohm	2 Ohm	2 Ohm
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Signal-to-Noise Ratio	80dB	75dB	80dB
Frequency Response	10Hz - 30kHz +/- 0.5dB	10Hz - 30kHz +/- 0.5dB	10Hz - 30kHz +/- 0.5dB
Linear Bandwidth	10Hz - 30kHz +/- 3dB	10Hz - 30kHz +/- 3dB	10Hz - 30kHz +/- 3dB
Damping Factor	>100	>100	>150
Crossover Filter Slope	12dB/octave	12dB/octave	12dB/octave
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Front Variable	n/a	9iÃ	n/a
High-Pass Switch
Front High Pass Filter	n/a	ÓÊ*œÃˆÌˆœ˜Ê­*ʜÀÊՏÊ	n/a
		,>˜}i®
Front Gain Control	n/a	250mV to 5V	n/a
Rear High Pass Filter	n/a	ÎÊ*œÃˆÌˆœ˜Ê­*]ÊՏ]Ê*®	n/a
Rear Gain Control	n/a	250mV to 5V	n/a
Crossover Switch	ÎÊ*œÃˆÌˆœ˜Ê­*]ÊՏ]Ê*®	n/a	ÓÊ*œÃˆÌˆœ˜Ê­*]ÊՏ®
Crossover Frequency Range	50Hz-500Hz	n/a	50Hz-500Hz
Front Variable Bass Control	n/a	6>Àˆ>LiÊ­ä` Ê̜ʳn` ®	n/a
Rear Variable Bass Control	n/a	6>Àˆ>LiÊ­ä` Ê̜ʳn` ®	n/a
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