Troubleshooting Tips

Symptom

Probable Cause

Action To Take

 

 

Audio cycles on and off

 

 

 

 

 

Thermal protection engages when

Make sure there is proper ventilation for

 

amplifier heat sink temperature

amplifier and improve ventilation as needed..

 

exceeds 85° C (185° F)..

 

 

 

 

 

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..

 

capability of amplifier..

 

 

 

 

 

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

Check speaker wires and repair or replace as needed..

 

to amplifier properly..

 

 

 

 

 

Internal crossover not

Readjust crossovers.. Refer to the Line Level

 

set properly for speakers..

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

Check speaker polarity and fix as needed..

 

causing cancellation at low frequencies..

 

 

 

 

 

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..

 

 

 

Specifications

Amplifier

PA D4000.4

 

 

Type

Bridgeable

 

Class D MOSFET

 

 

Channels

4 channel

 

 

RMS Continuous Power

125 W x 4

@ 4 Ohms

 

 

 

RMS Continuous Power

200 W x 4

@ 2 Ohms

 

 

 

Power Bridged @ 4 Ohms

400 W x 2

 

 

Distortion at Rated Power

<0..1%

 

 

Minimum Impedance Bridged

4 Ohms

 

 

Minimum Impedance

2 Ohms

Not Bridged

 

 

 

Signal-to-noise Ratio

105dB

 

 

Frequency Response

20Hz-20kHz

 

 

Damping Factor

>100

 

 

Crossover Filter Slope

12 dB/octave

(dB/octave)

 

 

 

Filter Switch (Front)

3-position

 

(HPF, Full, BPF)

 

 

High Pass Filter

20Hz - 4kHz

Frequency Range (Front)

 

 

 

Low Pass Filter

50Hz - 5kHz

Frequency Range (Front)

 

 

 

Front Gain Control

200mV - 6V

 

 

Amplifier

PA D4000.4

 

 

Filter Switch (Rear)

3-position

 

(HPF, Full, BPF)

 

 

High Pass Filter

20Hz - 4kHz

Frequency Range (Rear)

 

 

 

Low Pass Filter

50Hz - 5kHz

Frequency Range (Rear)

 

 

 

Rear Gain Control

200mV - 6V

 

 

Line Level Inputs (y/n)

Yes

 

 

Line Level Outputs (y/n)

No

 

 

LED Power Indicator

Yes

 

 

LED Protection Indicator

Yes

 

 

Supply Voltage

10V - 16V

 

 

Fusing & Power/Type

(1) 40A (1) 35A ATC

 

 

Power Connections

4 AWG

 

 

Ground Connections

4 AWG

 

 

Speaker Connections

12 AWG

 

 

Height

1 13/16" (46 mm)

 

 

Depth

6 3/4" (171.5 mm)

 

 

Width

10 15/16" (277.8 mm)

 

 

Width w/ Terminal Adaptor

11 11/16" (296.9 mm)

 

 

Weight

5 lbs (2..7 kg)

 

 

10

© 2011 Polk Audio—all rights reserved

© 2011 Polk Audio—all rights reserved

11

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Polk Audio PAD4000.4 manual Specifications, Amplifier PA D4000.4
Page 5 Page 7

PAD4000.4 specifications

The Polk Audio PAD4000.4 is a versatile and powerful amplifier designed to elevate the audio experience in any vehicle. This four-channel amplifier boasts a robust design and comes packed with features that cater to both casual listeners and audiophiles alike.

One of the standout features of the PAD4000.4 is its impressive power output. Capable of delivering 100 watts RMS per channel at 4 ohms and up to 200 watts RMS per channel at 2 ohms, this amplifier ensures that your speakers receive plenty of power for clear, dynamic sound. This level of output is particularly beneficial for larger sound systems, allowing for rich bass and detailed highs that can fill any car interior.

The PAD4000.4 incorporates advanced technological features to enhance audio quality. One such technology is the proprietary Dynamic Thermal Management System. This system effectively manages heat dissipation, allowing the amplifier to perform optimally even during extended use or in demanding conditions. Additionally, the amplifier features a low-frequency roll-off crossover that helps eliminate unwanted distortion and maintains clarity across all frequencies.

Installation is made easier with the PAD4000.4 thanks to its compact design and flexible input options. This amplifier comes with high-level inputs, which allow it to be connected directly to the factory stereo system without the need for a traditional RCA preamp output. This feature is particularly useful for users who want to upgrade their car audio system without completely replacing their existing head unit.

Furthermore, the PAD4000.4 offers an adjustable crossover that enables users to customize their sound output to fit their preferences. Whether you want to emphasize bass, mid-range, or treble, the adjustable settings allow for precise control, ensuring a personalized audio experience.

Durability is another key characteristic of the PAD4000.4. Designed to withstand the rigors of automotive environments, the amplifier features a rugged chassis and high-quality components that guarantee longevity and reliability.

In summary, the Polk Audio PAD4000.4 is an impressive amplifier that combines power, technology, and versatility. With features such as dynamic thermal management, a compact design, and customizable audio settings, it caters to a wide range of users looking to enhance their car audio systems. Whether you are a music enthusiast or someone looking to upgrade their sound, the PAD4000.4 is a compelling choice that delivers performance and quality.
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