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In Phase In Phase XT-12 1400 Watts 12" Subwoofer Dual voice cXT-12
£51.56 Save £83.42  was:£134.98
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5 Stars (6)

In Phase XT-12 1400 Watts 12" Subwoofer Dual voice coil 400 watts RMS Kevlar Fibra cone

£51.56 Save £83.42 (62%)  was:£134.98
5 Stars
6 Review(s) / write a review
Quickfind Code - 31957
Quick Summary:

In Phase is proud to introduce a new series of professional subwoofers designed in Britain by a team of dedicated engineers.

Save £83.42 (62%)
rrp: £134.98
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  • Easy Returns Easy Returns
  • 1 Year Easy Warranty 1 Year Easy Warranty

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Key Features

1400 Watts 12" Subwoofer Dual voice coil 400 watts RMS Kevlar Fibra cone - In Phase XT-12

Untitled Document

NEW 2014 In Phase XT Series subwoofer

In Phase is proud to introduce a new series of professional subwoofers deisgned in Britain by a team of dedicated engineers.

The NEW In Phase XT range is the second generation of the XT series subwoofers. With some huge improvements to the already fantastic XT series these 2nd gen XT subwoofer really need to be heard and handled to appreciate there true quality. The heavy duty heavy gauge stamped basket with a black powder coated finish shows it means business, and with the kevlar fiber enhanced nonpress paper cone and Hi-roll foam surround allowing it to handle some impressive power ratings. The 1400 watts peak and 400 watts RMS has been achieved by the 2' High-temp 4 layer aluminium voice coil, 1 piece 2 Layer black poly-cotton spider and the very impressive double stacked 90oz magnets. All this power is kept cool by the black finish t-yoke with VC direct cooling vents. This In Phase XT subwoofer series deserves a new league of its own.

Download image of In Phase XT-12 Click here for Image of In Phase XT-12
Technical Specification
Features and Spec
  • Heavy duty gauge stamped basket with black powder finish
  • Kevlar fiber enhanced nonpress paper cone
  • Hi-roll foam surround
  • Black kevlar woven dust cap
  • 2" High temp 4-layer aluminium voice coil
  • 1-pc 2-Layer black poly-cotton spider
  • Tinsel woven on spider
  • Double stacked 90oz magnets
  • Black finish T-Yoke with VC direct cooling vents
  • 400 Watts RMS
  • 1400 Watts Peak handling power
  • 88.4 SPL Db
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Customer reviews

Hamza on 20/09/2016 5 star rating

I was recommended this Inphase XT12 subwoofer with a port box by your staff at the Ilford store. I'm so glad i listened to their advise. It sounds awesome and in my Golf. Big Thanks to the staff at your Ilford store.

great sub for the money
marco on 19/09/2016 5 star rating

I'm running one of these on a IPA1041 and its very impressive, giving me plenty of bass in my Honda civic.

Great sub!
charles on 31/10/2014 5 star rating

I had 2 of these installed at Leicester branch running of a in phase amplifier. Sound sweet, real smooth deep bass. great clarity. Thank you for a great product and service.

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Questions/Answers About This Product
  • Question: 22 May 2015
    Car: Vauxhall Astra - 2004>

    Hi there, I brought this subwoofer and I'm running a kenwood KAC PS520 amplifier with a 4 gauge wiring kit and a 2 farad capacitor. My question is what ohms will it perform best at With my setup?


    I would suggest you run it at 4ohms.

    Found Useful? Yes 

  • Question: 28 March 2015
    Hi, it doesn't say what ohm these subs are and whether they are dual or single,can you help please?


    These Inphase XT 12 are dual 2 ohm subwoofers.

    Found Useful? Yes 

  • Question: 07 January 2014
    What would be the best amp to run this subwoofer

    the best amp for the inphase sub would be ipa1601 IPA1601 1600 Watts 2 Channel Amplifier

    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