• 400 Watts Max Power
• Compact Design for Versatile Installation Options
• Refined Class-D Design Offers Extreme Efficiency and High-Quality Sound


An amplifier shouldn’t take up too much space, especially in your car. The GM-D1004 is a compact amplifier that can easily be installed behind the dashboard of your car – cables are included!

Power can be taken from the console panel thanks to its protection control system, which suppresses excess current during large output. Additionally, it prevents extreme overheating of parts and maintains stable operations.


It may be small but don’t let the size fool you. The GM-D1004 is capable of delivering up to 400 Watts of maximum output and is more than comfortable providing 45 Watts of power per channel, that’s more than enough to improve the performance of your factory or aftermarket speakers.


Today more and more music lovers are taking their music off-road and finding ways to enjoy their music recreationally. With the GM-D1004 you can add great sound to your motorcycle, ATV, or boat where a conventional size amplifier may not fit.


For DIYers, the GM-D1004 amplifier is not only small and powerful but it’s easy to install. Simply connect power and ground at the radio and get more installation flexibility using hi-level or low-level inputs with a signal sensing remote turn on so you can use it in combination with a factory or aftermarket headunit.


When you buy a Pioneer product, you’re not only purchasing the very you are buying peace of mind. All products listed come with a 12 month manufacturer’s warranty; except brand new Pioneer AVIC products, which come with a 3 Year Warranty. Any warranty repair work should be performed by a Pioneer Authorised Service Centre warranty.

We do not offer an extended manufacturer warranty.

If a product has been delivered to you and you have opened the original product packaging then you have agreed to be bound by these terms and conditions. Returns for refunds will only be accepted within 14 days of receipt of goods. Returned goods must be in their original condition. Shipping and handling costs are not refundable. A restocking fee may apply.

Where the product is not returned within 14 days, Pioneer reserves the right not to accept return of the product, except where the product is under manufacturer’s warranty and you can provide evidence that the product is faulty.

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

All products sold on the Pioneer Australia website are brand new. All products include a manufacturer’s warranty.


  • General Enquiries – 1800 988 268
  • Sales Enquiries – 1800 060 852
  • Product Tech Support – 1800 672 102
  • Spare Parts – 1800 331 763
  • Service & Repairs – 1800 188 397

You can register your Pioneer product by joining our consumer loyalty club – Backstage Pass.
By doing so, Pioneer Australia can then alert you to any news/information regarding your purchase, including firmware or software updates. Moreover, you are then eligible to receive exclusive offers and invitations from Pioneer.

All the latest firmware/software for every Pioneer product can be located on the relevant website product page, under the tab FIRMWARE&SOFTWARE. Alternatively, you can search via the SUPPORT section on this website.


If you purchase directly from the Pioneer Australia website, you are entitled to FREE SHIPPING within Australia – all states and territories.

All purchases are usually delivered via Aussie Air Express; leaving our Melbourne warehouse within 2 working days of receipt of your order. Our sales team processes orders between 9am – 5pm weekdays. Once stock leaves our warehouse, delivery ETA is:

Melbourne – Overnight / VIC regional – 2 days
Sydney/ACT – Overnight / NSW regional – 2 days
Brisbane – Overnight / QLD regional – 2 days
Adelaide – Overnight / SA regional – 2 days
Perth – Overnight / WA regional – 2 – 4 days
Darwin – Overnight / NT Other – 2-4 days

All online orders are despatched from our national warehouse in Melbourne.

You will receive an email notification when your order has been shipped and is on its way to you.

No. All online purchases from the Pioneer Australia website will be delivered directly to you.

Show Differences

RCA Inputs4-CH
Amplifier ClassCLASS-FD
Hi-Res CertifiedNo
Warranty1 Year
Speaker Level InputYes
Fuse Rating15A x 1
Bass Boost RemoteNo
Automatic Signal Sensing and Turn-OnYes
Hi-Volt Input Level ControlN/A
Terminal TypeRemovable
Load Impedance Allowance (Ohms)2 to 8
Protection Control SystemYes
Dimensions64mm (W) x 38mm (H) x 181mm (D)
Continuous Power (RMS) Output @ 1ΩN/A
Continuous Power (RMS) Output @ 2Ω45W x 4
Continuous Power (RMS) Output @ 4Ω45W x 4
Continuous Power (RMS) Output - Bridged @ 4Ω90W x 2
Audio Adjustments
Low-Pass Crossover Frequency80 Hz (LPF/OFF/HPF)
Low-Pass Slope (dB/octave)-12 dB/octave
High-Pass Crossover Frequency80 Hz (LPF/OFF/HPF)
Bass Boost FrequencyN/A
Bass Boost LevelN/A
Audio Specifications
Frequency Response10 Hz to 40 kHz (+0dB, -3dB)
Total Harmonic Distortion (THD)< 0.05% (1 kHz)
Signal-to-Noise (SN) Ratio75 dB