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polk - PA D4000.4 4 Channel Amplifier

By polk

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35 years in business
Australia wide install network

4 - Channel D Class Amplifier - (125W x 4) High

Pass Filter 12dB.oct Filter Frequency 20Hz-4kHz (front) 20Hz-
4kHz(rear) / Low Pass Filter 12dB.oct Filter Frequency 50Hz-
5kHz(front) 50Hz-5kHz(rear) / RMS Power at 14.4V:

Watts per channel NOT bridged @ 1 kHz 4 ohms 125 watts 2
ohms 200 watts / Watts per channel bridged 4 ohms 400 watts

 The PA D4000.4 amplifier is capable of bridging two full-range channels into a single full range channel with higher output power. For instance, one front and one rear channel will increase the output power from 125W per channel to 400W per channel (for a 4 ohm load). The most common hookups for the PA D4000.4 would be four full-range channels, two full-range channels and a bridged sub, or two bridged subwoofers.

Super-efficient class D design�Runs much cooler than conventional amps.

High-speed MOSFET�Switching power supply.

Toroidal transformers�Help keep the amplifier�s sleek design under 2-inch tall while ensuring plenty of clean, efficient power.

Protection�Thermal, DC offset, reverse DC voltage and short circuit protection.

 Nickel-plated wire terminals & RCA connectors�Ensure maximum signal transfer.

Front & rear level controls�Adjust the gain of the front and rear channels to match the output voltage from your head unit.

 Low-pass & high-pass frequency controls�Enables you to adjust crossover overlap for better blending of speakers.

 Front & rear BPF, FULL, HPF switches�Selects full range, high pass filter, or bandpass filter to dial in your speaker blending.

 Channel mode switch (ST/4Ch)�In the stereo position, the amplifier will send the same signal to front and rear channels.

Stainless steel hardware�Used throughout won�t corrode in humid environments.

Other Details
  • Refund & Returns Policy

    GL Pro Sound prides itself on supplying high quality goods and the highest levels of customer service. We are happy to serve you at the highest level, especially in the case of an issue with the goods you have purchased. Please email us at within the warranty period so that we can address any problems, faults or issues.

    In accordance with ACCC guidelines, we will endeavour to fix any problem, fault or issue with a good or service provided by us, within a reasonable timeframe, provided you retain your proof of purchase, have not abused or tampered with the product or service in question, or have not simply changed your mind or found it cheaper elsewhere. Also, you are not covered in the case that the issue, problem or defect was explained to you upon sale or delivery of the goods/services.

    In the event that the product is not repairable, we will replace the product.

    In the event that the product cannot be replaced, or an acceptable replacement cannot be agreed upon, you are entitled to a refund, or an applicable store credit if you would prefer.

    All postage and insurance costs are to be paid by the buyer. We recommend that you return the product via Registered post and that you prepay all postage.

    You assume any risk of lost, theft or damaged goods during transit; therefore we advise you take out shipment registration of insurance with your postal carrier. GL Pro Sound will not be responsible for parcels lost or damaged in transit if you choose not to insure.

    The ACCC regulations and guidelines on the above, as well as a link to the Australian Consumer Law Consumer Guarantees can be found here:

    If you have any enquiries regarding this document and/or the payment services offered by us through Shopify Payments, please email us at


    Shipping Policy

    Gl Pro Sound will ship in stock goods within 48hrs some goods may be subject to be shipped within 14 days of receiving the order. All orders are shipped via Sendle. If goods cannot be processed a full refund will be offered. Shipping rates are $15 Aud flat rate 20kg and under. Over 20kgs will be calculated at checkout. If you have any queries please email

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