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Pioneer GM-A6704 - 1000W 4-Channel Bridgeable AmplifierGMA6704
£98.00 Save £81.99  was:£179.99
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4 Channel Amplifiers Pioneer GMA6704

Pioneer GM-A6704 - 1000W 4-Channel Bridgeable Amplifier

£98.00 Save £81.99 (46%)  was:£179.99
5 Stars 5
Quickfind Code - 40048
Quick Summary:

Give into your deepest desire for power. Work it out how you want with the bridgeable amps. Just consider the consequences whatever you do: pure and clean, distortion-free power.

Save £81.99 (46%)
rrp: £179.99

Finance Available
On Orders Over £300

  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders before 5pm
  • Easy Returns Easy Returns
  • 1 Year Easy Warranty 1 Year Easy Warranty

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Key Features

1000W 4Channel Bridgeable Amplifier - Pioneer GMA6704

Untitled Document

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-A6704 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-A6704'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.

Download image of Pioneer GMA6704 Click here for Image of Pioneer GMA6704
Technical Specification
Main Features:
  • HPF 40-500Hz (-12 dB/oct)
  • Speaker Terminals - Screw-type
  • Speaker Input Level - 3 - 26 V
  • Max. current consumption - 31A
  • Chassis size (W x H x D) - 356(W) X 60(H) X 215(D)
  • Unit weight - 2.2kg
  • Maximum power input - 1000W (Bridged) or 4 x 170W (4 Ω) or 4 x 250 W (2 Ω)
  • 4-channel
  • CEA 2006 Power - 4 x 60W (4 Ω)
  • Continuous power output - 4 x 60W (4 Ω) or 4 x 95W (2Ω) or 2 x 190 W (4Ω bridged)
  • Variable LPF
  • Load impedance capability - 2-8 ohm allowable (stereo)
  • Frequency response - 10Hz ~ 70kHz (+0dB , -3dB) Hz
  • Distortion < 0.05 %
  • S/N ratio > 95 dB
  • Bass Boost - 50Hz; 0-12dB
  • LPF - 40-500Hz (-12 dB/oct)
  • Connections: High Voltage Output - 300 mV - 6.5 V
  • Audio - Variable HPF
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Questions/Answers About This Product
  • Question: 26 December 2019
    Car: Ford Focus - 2004>

    Hi.Ford Focus mk3.5 2015 with original Sync2 radio. I'm looking to upgrade front speakers to Focal 165AS. Would this amp be fine for this speakers and what adapters/harness would I need. Thanks


    we would recommend using a better quality amplifier for speakers, something like the GMD8704 isnt that much more expensive but would sound far better. you would need also the following

    JWTRU42PS 4 Gauge Four Channel Amplifier Wiring Kit
    In Phase Speaker to Rca Converter adjustable output gain

    Found Useful? Yes 

  • Question: 06 December 2019
    Car: Fiat Punto - 2005> (Grande)

    I've just bought 2 sets of ts r1750s and I need an amplifier to go along with them. Do you think this amp will work with me having the stock head unit.


    You can use the GM-A6704 amplifier to power the TS-R1750S.

    Found Useful? Yes 

  • Question: 22 August 2019
    Car: Honda

    There are matching 2 pairs of pioneer ts a1600c speakers ???


    can you put in more detail your question please, would you like to know if this amplifier is suitable for the TSA1600C? if so then yes it would be.

    Found Useful? Yes 

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Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

542 546 Mansfield Road, Sherwood NG5 2FR
Tel: 0115 9624 986
743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368
835 Garratt Lane, Tooting, London, SW17 0PG
Tel: 0208 971 9181