Shopping Cart 0 items · $0.00

    (All items shipped from our Sydney warehouse)


    $9.95 on all orders

    Heavy Items Excluded


    Best Prices & Price Matching


    Money Back Guarantee

Pioneer GM-A4704 520W 4 CH Car Amplifier

Click on above image to view full picture

  • Pioneer GM-A4704 Car Amplifier

List Price: $179.00 On Sale: $118.85 (GST Included) (You save 33.60%)

SKU: GMA4704

Expected Soon

$9.95 Flat Rate Generally ships out in 24 to 48 hours.


How To Build A Bundle

The following accessories can be bundled with your purchase by checking the green ‘Include with Product’ button. You can add as many items to your order as you require and then simply ‘Add to Cart’ to complete order.

Product Info

Product Info

Check out the Pioneer GMA-4704 Amplifier's Key Features
(Pioneer GMA4704)

  • Genuine Pioneer Australian Warranty
  • Peace of Mind Purchase Guarantee (bottom of page)
  • 520 Watts Max Power
  • Automatic turn on
  • Automatic signal sensing
  • Variable low pass and high pass filters
  • Speaker Level Inputs
  • 2-8 ohm allowable load impedance


Feel the Difference
From dramatic distinction to dramatic design, Pioneer's new GM-Series amplifiers are thrillers in every sense, pushing the limits of flexibility and functionality.

The 4-channel GM-A4704 delivers a 520 watts max in a compact design - plenty of juice to power your speakers. It's also got built-in low-pass/high-pass crossovers, speaker level inputs for easy connection to an OEM headunit and oversized power terminals.


CEA2006 Specifications
Power Output: 40 Watts RMS x 4 Channels (4 ohms ≤ 1% THD+N)
Power Output: 65 Watts RMS x 4 Channels (2 ohms ≤ 1% THD+N)
Signal-to-Noise Ratio: 94 dBA (Reference: 1 Watt into 4 ohms)

Inspired By Excellence
Pioneer is constantly finding ways to make amplifier technology better. Our new and improved GM-Series prove how you can add cutting edge technology and more power to your system without breaking the bank. Like all Pioneer products, these amps are fully tested to ensure that each is designed and built for performance.

Higher Power
Having more power isn't just about LOUD. It's also about CLEAN, getting the most out of your speakers and your music. Constant road noise makes it hard for the music to be heard clearly. But with 480 watts max. power, you'll get to hear all the words and all the notes.

Variable LPF/HPF
Variable LPF (low-pass filter) and HPF (high-pass filter) allow for adjustable frequency between 40 Hz to 500 Hz and greater car audio system flexibility according to subwoofer characteristics and personal listening preferences. The GM-A4704 has a variable LPF/HPF on Ch. B and fixed LPF/HPF on Ch. A.

High Capacity Switching Power Supply
To suppress power supply loss, GM-Series amplifiers incorporate a large toroidal transformer and are driven using a high-speed switching MOSFET. This stabilization of power supply maintains stable playback of all types of music.

Gain Control
What is power without control? To accommodate the varying range of signal levels coming from today's factory and aftermarket radios, all of Pioneer's GM-series amplifiers feature adjustable gain controls. This means that no matter what kind of radio is connected to this amplifier, the appropriate gain control adjustment can be made to ensure loud, clear, distortion-free music. And even if the gain control level is set improperly, Pioneer's Gain Control Caution feature will automatically reduce the amplifier's output until the headunit volume is decreased to acceptable levels. This added layer of protection helps to prevent damage from occurring to the amplifier and the speakers connected to it due to improper gain control adjustments.

Bringing The System Together
What, you DON'T own a Pioneer headunit? Well, we won't hold it against you. In fact we'll even help you build onto your system. The GM-A4704's speaker level inputs allow you to connect your OEM unit (or any unit that doesn't have the typical RCA-type inputs) without having to buy add-on adapters. SO, the install goes faster, you save money, and you've got a Pioneer amp in your vehicle.

Pioneer Electronics

Pioneer is a Japanese multinational corporation founded in 1937 that specializes in digital entertainment products. It's one of the most trusted brands in practically any field of car audio. With the renowned innovation, persistence and integrity of Japanese businesses, you can expect the latest technology and the highest possible quality from Pioneer car audio products.

Peace of Mind Purchase Guarantee
This product is supplied via Pioneer Australia and enjoys the FULL benefits of the 'Genuine Pioneer Australian Warranty'. (You may also be entitled to other consumer warranties as provided by the Australian Consumer Guarantee and these entitlements are not limited by this warranty). In the event that this product should fail please contact our service department or you can speak with Pioneer Australia directly.

We are a FULLY AUTHORISED Australian retailer for Pioneer Australia.

Due to differing operating costs associated with selling products via different marketplaces such as eBay, Amazon or our Online Store, our pricing may vary as a result.

Tech Specs

Technical Specifications

  • Maximum Output Power : 520W (Bridged) or 4 x 80W (4 Ω) or 4 x 120 W (2 Ω)
  • CEA 2006 Power (THD + N = 1%) : 2 x 120W (4 Ω)
  • Continuous power output (RMS) : 4 x 40W (4 Ω) or 4 x 65W (2Ω) or 1 x 120 W (4Ω bridged)
  • Load impedance capability : 2-8 ohm allowable (stereo)
  • Frequency response : 10Hz ~ 70kHz (+0dB , -3dB) Hz
  • Distortion: < 0.05 %
  • S/N ratio : > 94 dB
  • LPF 80Hz: (-12 dB/oct)
  • RCA terminals: (input)
  • Speaker Terminals : Screw-type
  • High Voltage Input (+) : 300 mV - 6.5 V
  • Speaker Input Level: 3 - 26 V
  • Max. current consumption (A/4Ω) : 20.5A
  • Chassis size : (W x H x D) 318(W) X 60(H) X 215(D) mm
  • Unit weight : 2.1 kg
In The Box

What's Included?

  • Pioneer GMA4704 520W 4 CH Car Amplifier

No Reviews Available

  •   1 star 2 stars 3 stars 4 stars 5 stars

* Required Fields

Build your own bundle

Select up to 3 items from the tabs below.

  • item
  • item
  • item

Pioneer GM-A4704 520W 4 CH Car Amplifier

Amp Wiring Kits

Build your own bundle - Choose up to 2 item(s) from this category

RCA Leads

Build your own bundle - Choose up to 2 item(s) from this category

Speaker Wire

Build your own bundle - Choose up to 2 item(s) from this category