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.
Battery fuse blowing
Short in power wire or incorrect wiring.
Fuse used is smaller than recommended.
Actual current exceeds fuse rating.
Amplifier fuse blowing
Fuse used is smaller than recommended.
Impedance load at amplifier is too low.
Speaker is blown with shorted outputs
Actual current exceeds fuse rating
16
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.
Check power wires and ground connections
and repair or replace as needed.
Replace with proper fuse size.
Check speaker impedance load if below 2 Ohm,
rewire speakers to achieve higher impedance.
Replace with proper fuse size.
Check speaker impedance load if below 2 Ohm,
rewire speakers to achieve higher impedance.
Check system with known working speakers
and fix or replace as needed.
Check speaker impedance load if below 2 Ohm,
rewire speakers to achieve higher impedance.
© 2010 Polk Audio—all rights reserved
SPECIFICATIONS
Amplifier
PA330
Type
Bridgeable Class AB
MOSFET
Channels
2/1
RMS Continuous Power
75W x 2
@ 4 Ohm
RMS Continuous Power
100W x 2
@ 2 Ohm
RMS Continuous Power
200W
Bridged @ 4 Ohm
Dynamic Power @ 4 Ohm
150W x 2
Dynamic Power @ 2 Ohm
200W x 2
Dynamic Power Bridged @
300W
4 Ohm
Dynamic Peak Power
300W
Distortion at Rated Power
<0.9%
Externally Bridgeable
No
Remote Gain Functions
No
Remote Gain Control Included
n/a
Minimum Impedance Bridged
4 Ohm
Minimum Impedance
2 Ohm
Signal-to-Noise Ratio
80dB
Frequency Response
10Hz - 30kHz +/- 0.5dB
Linear Bandwidth
10Hz - 30kHz +/- 3dB
Damping Factor
>100
Crossover Filter Slope
12dB/octave
Front Variable
n/a
High-Pass Switch
Front High Pass Filter
n/a
Front Gain Control
n/a
Rear High Pass Filter
n/a
Rear Gain Control
n/a
Crossover Switch
Crossover Frequency Range
50Hz-500Hz
Front Variable Bass Control
n/a
Rear Variable Bass Control
n/a
© 2010 Polk Audio—all rights reserved
PA660
PA880
Bridgeable Class AB
Class AB MOSFET
MOSFET
4/3/2
1
75W x 4
300W x 1
85W x 4
500W x 1
150W x 2
na
150W x 4
500W x 1
170W x 4
800W x 1
300W x 2
n/a
600W
800W
<0.9%
<0.9%
No
No
n/a
4 Ohm
4 Ohm
2 Ohm
2 Ohm
75dB
80dB
10Hz - 30kHz +/- 0.5dB
10Hz - 30kHz +/- 0.5dB
10Hz - 30kHz +/- 3dB
10Hz - 30kHz +/- 3dB
>100
>150
12dB/octave
12dB/octave
n/a
n/a
250mV to 5V
n/a
n/a
250mV to 5V
n/a
n/a
n/a
50Hz-500Hz
n/a
n/a
17