Polk Audio PA D4000.4, Owner'S Manual

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10 © 2011 Polk Audio—all rights reserved © 2011 Polk Audio—all rights reserved 11
Audio cycles on and off
Thermal protection engages when
amplifier heat sink temperature
exceeds 85° C (185° F). Make sure there is proper ventilation for
amplifier and improve ventilation as needed.
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
too high exceeding maximum
capability of amplifier. Readjust gain. Refer to the Adjusting the Sound of the
System section of this manual.
Impedance load to amplifier too low. Check speaker impedance load if below (2 Ohms, 4 Ohms
min bridged); rewire speakers to create higher impedance.
Shorted speaker wires. Check speaker wires and repair or replace as needed.
Speaker not connected
to amplifier properly. Check speaker wires and repair or replace as needed.
Internal crossover not
set properly for speakers. Readjust crossovers. Refer to the Line Level
Inputs/Controls section of this manual.
Speakers are blown. Check system with known working speakers
and fix or replace as needed.
Poor bass response
Speakers wired with wrong polarity
causing cancellation at low frequencies. Check speaker polarity and fix as needed.
Crossover set incorrectly. Reset crossovers. Refer to the Amplifier Settings section.
Impedance load at amplifier is too low. Check speaker impedance load if below (2 Ohms, 4 Ohms
min bridged); rewire speakers to create 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 Ohms, 4 Ohms
min bridged); rewire speakers to create 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 Ohms, 4 Ohms
min bridged); rewire speakers to create 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 Ohms, 4 Ohms
min bridged); rewire speakers to create higher impedance.
TROUBLESHOOTING TIPS
Symptom Probable Cause Action To Take
Amplifier PA D4000.4
Type Bridgeable
Class D MOSFET
Channels 4 channel
RMS Continuous Power
@ 4 Ohms 125 W x 4
RMS Continuous Power
@ 2 Ohms 200 W x 4
Power Bridged @ 4 Ohms 400 W x 2
Distortion at Rated Power <0.1%
Minimum Impedance Bridged 4 Ohms
Minimum Impedance
œÌÊ Àˆ`}i`
2 Ohms
Signal-to-noise Ratio 105dB
Frequency Response 20Hz-20kHz
Damping Factor >100
Crossover Filter Slope
(dB/octave) 12 dB/octave
Filter Switch (Front) 3-position
(HPF, Full, BPF)
High Pass Filter
Frequency Range (Front) 20Hz - 4kHz
Low Pass Filter
Frequency Range (Front) 50Hz - 5kHz
Front Gain Control Óää“6ʇÊÈ6
Amplifier PA D4000.4
Filter Switch (Rear) 3-position
(HPF, Full, BPF)
High Pass Filter
Frequency Range (Rear) 20Hz - 4kHz
Low Pass Filter
Frequency Range (Rear) 50Hz - 5kHz
Rear Gain Control
Óää“6ʇÊÈ6
Line Level Inputs (y/n) Yes
Line Level Outputs (y/n) œ
LED Power Indicator Yes
LED Protection Indicator Yes
-Õ««ÞÊ6œÌ>}i £ä6ʇʣÈ6
Fusing & Power/Type (1) 40A (1) 35A ATC
Power Connections 4 AWG
Ground Connections 4 AWG
Speaker Connections 12 AWG
Height £Ê£Îɣȸʭ{Èʓ“®
Depth
ÈÊÎÉ{¸Ê­£Ç£°xʓ“®
Width £äÊ£xɣȸʭÓÇÇ°nʓ“®
Width w/ Terminal Adaptor
££Ê££É£È¸Ê­Ó™È°™Ê““®
Weight 5 lbs (2.7 kg)
SPECIFICATIONS