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Fit it Yourself?

Everything you need to fit it yourself at home

Only £30.00 

With Steering Wheel Control
Only £50.00 

5 Stars (10)
4 Channel Amplifiers In Phase IPX1004

In Phase IPX1004 4 channel 1200 watts amplifier

Save: £130.00 (52%)  rrp: £249.99
5 Stars
10 Review(s) / write a review
Quickfind Code - 23990
Save: £130.00 (52%)
rrp: £249.99
This product has been discontinued

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

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Sorry, this product has been discountinued. We recommend the following product.

In Phase IPA1001 1000 Watts 2 Channel Amplifier
In Phase IPA1001

Key Features

4 channel 1200 watts amplifier - In Phase IPX1004

InPhase Audio Won FAST Car AwardInPhase IPX1004
InPhase amplifiers are made to rock your world. With great muscle also comes refinement. Advanced features such as bass boost, fully variable zero to 60Hz subsonic filters and crossover networks with different frequency bands for highpass and lowpass, you will always have full control. Connectivity is excellent with high level as well as RCA inputs and a pass through RCA output to feed more amps, without needing multiple runs of RCA cables. With two ohm stable designs, trimode capability and clever protection circuits, these hand-built powerhouses will take anything you throw at them. Massive heat sinks with a high surface area to volume ratios and cast end caps to hide the wiring connections and keep things controlled – helped by forced air cooling on the real bass monsters. All the amps may be bridged for even more power into one channel. Four and two channel designs, all with potent MOSFET power supplies, cover every need from single-amp whole system solutions, all the way to pavement-shaking power mania. There is always a high quality InPhase amplifier (or two) that’s just perfect for your hunger for power.
The New InPhase IPX range of amplifiers from InPhase are possibly one of the best car amplifiers available today. Car amplifiers are the heart of a system and need be of the best quality available for your budget. Inphase IPX range of car amplifiers have been renowned throughout the world and are rated very high by some of the most famous musicians like Akon.  All Inphase IPX car amplifiers are hand assembled and go through 35 different check points to ensure you get the best possible car amplifier today. The IPX range of car amplifiers give you the true RMS power to power your system. Some of the amazing features of the new Inphase IPX range of amplifiers have a Subsonic filter so you can adjust your amplifier to deliver more power to the desire frequency range, which mean more power to your speaker. Line in and line out so you can run as many InPhase amplifiers as you want one a single RCA cable. Dual layer circuit boards for improved sound quality and low resistance from internal parts give you a smaller and yet more powerful amplifier.

Download image of In Phase IPX1004 Click here for Image of In Phase IPX1004
Technical Specification
Key Features:
  • 4 Channel 1200 watts amplifier
  • Four Class 'AB' High Current Dual Discrete Drive Stages
  • Class 'AB' Technology MOSFET PWM Power Supply
  • Bridgeable & Tri-Mode Operation
  • Continously Variable 12dB / Octave High Pass & 12dB Octave Low Pass Crossover
  • Subwoofer Variable Crossover for Deep Bass Crossover
  • Enhanced Bass Boost +12dB @ 50Hz
  • Silver plated RCA Power & Speaker Terminals
  • Soft Start & Muting
  • Thermal, short and DC Circuit Protection
  • Power & Protection Indicator
  • Low pass filter: 50Hz - 250Hz (variable)
  • High pass filter: 80Hz - 1.2kHz (variable)
  • Subsonic filter: 20Hz - 50Hz (variable)
  • Dimensions: 255mm x 58mm x 444mm
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Customer reviews

great amp
Joe on 12/03/2016 5 star rating

no issues with this amp, sounds good, good adjustment, good instruction manual included. got 2 speakers and a sub and it does the job well. good service from car audio centre

Inphase ipx 1004
JASONRASHEED on 16/09/2015 5 star rating

Brilliant service excellent amp just need some powerful speakers now

Excellent amp and faultless service.
simon on 02/09/2014 5 star rating

Great amp and great service from Car Audio Centre. Amp arrived day after ordering. Easy to install. Who could ask for more?

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Questions/Answers About This Product
  • Question: 13 May 2017
    Car: Ford Focus - 2004>

    Would this amp be run 2 x 12 inch subwoofer and a pair of 6x9 speakers all of one amp?
    Would it require 1 or 2 pairs of rca leads to do this if so?


    thanks for your question, the IPX can do this job fine, one set of RCA is usually fine & running speaker cable for the rest.

    Found Useful? Yes 

  • Question: 31 March 2015
    hi i was just wondering what the bridged rms power output of this amp is when bridged to 2 channels

    Hi the RMS power is around 150watts per channel @ 4ohm. Hope this helps. For more information feel free to pop in to your local store.

    Found Useful? Yes 

  • Question: 15 April 2014
    Car: Seat Ibiza - <2008

    Hi what is the frequency response of this amp ?

    The spec is at the bottom of this page

    Found Useful? Yes 

  • View All
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