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In Phase IPA9701D 1 Ohm Stable 2400 Watts Monoblock with Subsonic FIPA9701D
£189.99 Save £110.00  was:£299.99
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5 Stars (16)

In Phase IPA9701D 1 Ohm Stable 2400 Watts Monoblock with Subsonic Filter

£189.99 Save £110.00 (37%)  was:£299.99
5 Stars
16 Review(s) / write a review
Quickfind Code - 42214
Quick Summary:

Audio serenity is not possible without state of the art technology. The New InPhase IPA range of amplifiers are possibly the best car amplifiers available today.

Condition: New

Save £110.00 (37%)
rrp: £299.99
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  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Easy ReturnsEasy Returns
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders before 5pm

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Key Features

1 Ohm Stable 2400 Watts Monoblock with Subsonic Filter - In Phase IPA9701D

Car amplifiers are the heart of a system and need be of the best quality available for your budget. All Inphase IPA car amplifiers are hand assembled and go through 35 different check points to ensure you get the best possible car amplifier today. 

With One and 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. 

The newly designed IPA8701D, IPA8704D, IPA9701D and IPA9704D now incorporate digital technology into their design, these amps are direct competition to the Pioneer GM-D amplifiers.

The IPA series amplifiers are designed for performance in a performance build. So there is no speaker level input, these are designed to fit with an aftermarket headunit. But you do not need to panic, you can use a line out converter to fit this amplifier to your factory system. For fitting the IPA series amp to a factory system we advise using the In Phase SRCAPro or for higher performance, the In Phase SRC6.

British Design 

All In Phase amps are designed in the UK utilising over 30 years of audio experience to create a sound that is right for you. 

Improved Circuit Design

To prevent circuit shutdown, In Phase's new digital amplifier circuit, senses its internal temperature and automatically moderates input level accordingly. Stable, durable circuitry lessens the risk of high input power for the unit to achieve 1 Ω connection on the Monoblock IPA Amp and 2Ω  for the 4 channel IPA Amps. This design enhances the flexibility to connect multiple subwoofers to a system.

Variable Low Pass Filter

For extra flexibility, a variable LPF makes audio frequency more adjustable according to subwoofer characteristics and personal listening preferences. The LPF is adjustable from 30 Hz to 250 Hz.

Small Footprint

The IPA series amps are not massive slabs of metal/plastic. They are compactly designed ensuring easy fitting. 

True RMS Power

The In Phase IPA9701D/IPA9704D go through numerous check points to ensure you get the true performance you are paying for. 

Stealth Design

Along with the slim design, the blackout design of these amplifiers ensure this amp camouflages into your boot, the intimidating LED blue lights in a blackout area, will give your system that evil look.


Download image of In Phase IPA9701D Click here for Image of In Phase IPA9701D
Technical Specification
  • 500W RMS x1 @ 4 ohms
  • 800W RMS x1 @ 2 ohms
  • 1200W RMS x1 @ 1 ohms
  • 2400 Watts Max Power
  • Regulated power supply
  • MOSFET power supply
  • Oversize Power Tranformer
  • Bipolar Output devices
  • Dimensions (L x W x H) 380mmx 250mm x 55.5mm
  • Variable gain adjustment
  • Variable cross over (high/low pass)
  • Thermal protection
  • Overload protection
  • 1 ohms Stable
  • Variable Subsonic Filter 10Hz- 50Hz. Cut off -24dB/oct
  • Low pass filter frequency 50Hz - 250Hz. Cut off -24dB/oct
  • Digital Subwoofer Level Control
  • Bass Boost
Power Figures
  • 500W RMS x1 @ 4 ohms (At 14.4V. 4 Ohm 20Hz to 240Hz. > 1% THD)
  • 800W RMS x1 @ 2 ohms (At 14.4V. 2 Ohm 20Hz to 240Hz. > 1% THD)
  • 1200W RMS x1 @ 1 ohms (At 14.4V. 1 Ohm 20Hz to 240Hz. > 1% THD)
  • 2400 Watts Max Power
  • Load Impedance- 1 ohm to 8 ohm
  • Average Current Consumption 1.6A (4 ohm for one Channel)
  • Average Current Consumption 1.7A (2 ohm for one Channel)
  • Average Current Consumption 2.0A (1 ohm for one Channel)
  • Fuse- 40A x3
  • Maximum input level/impedance 6V/22K ohm
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Customer reviews

Buckets of Power
Norman on 31/08/2021 5 star rating

This amp is extremely powerful. I replaced my Alpine with this as I was on a budget and I am shocked how powerful it is and it really does sound better too. The bass is more detailed and deeper. It has more kick too. In all the years of having a system in my car I never knew that bass could sound different on different amps. Well I do now and I love this In Phase. Ordering a In Phase subwoofer once I can afford it.

Honest Thoughts
Chaz on 13/06/2021 5 star rating

I've had this amp installed a few weeks now. I can say this amp is fantastic especially for the price. My subs are are wired to 2ohms so not pushing as much as the amp is capable of. Very impressed with the performance and would highly recommend. This is my honest review.

Pioneer subs
Jon on 24/11/2020 5 star rating

Running 2 Pioneer champion series subwoofers on this amp. Who needs a windscreen?

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Questions/Answers About This Product
  • Question: 11 July 2022
    Car: Audi A3 - 2003>

    Hi how much would it cost to fit this in my car? My reg is KR18ZTB
    Thank you

    Our stores can provide the fitting service for you. Sadly, you have come through to the mail order centre, so we cannot give you a price for that service. Please contact them on the below emails/number for more assistance.

    Car Audio Centre Nottingham
    120 - 122 Alfreton Road,
    NG7 3NR

    Car Audio Centre Ilford
    743-745 Eastern Ave,
    Newbury Park,
    IG2 7RS
    0208 599 2368

    Car Audio Centre Tooting
    835 Garratt Lane,
    SW17 0PG
    0208 971 9181

    Found Useful? Yes 

  • Question: 06 June 2022
    Car: Toyota Corolla - 2009>

    Hi, I'm planning to put 2 10" trex subs connect them at 1 ohm each. If I purchased 2 of the IPA9701D amps are they will be capable to rock the BX210P ported box or will be not good to run subs @ 1 ohm


    You are better off building a custom enclosure for those subs.

    Found Useful? Yes 

  • Question: 01 April 2022
    Can you run Trex 12” subwoofer with this amp with 0 or 2 gauge wiring?


    2 Gauge will be perfect

    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:

120 - 122 Alfreton Road, Nottingham, Nottinghamshire, NG7 3NR
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