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In Phase Car Audio In Phase XT-12 Kevlar Cone 2 Ohm Dual Voice CoilXT-12
£69.99 Save £80.00  was:£149.99
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5 Stars (9)

In Phase Car Audio In Phase XT-12 Kevlar Cone 2 Ohm Dual Voice Coil 1400W Peak Power Subwoofer

£69.99 Save £80.00 (53%)  was:£149.99
5 Stars
9 Review(s) / write a review
Quickfind Code - 31957
Quick Summary:

Bang for buck comes to mind when describing this subwoofer. 1400W peak power and 400W rms!

Condition: New

Save £80.00 (53%)
rrp: £149.99
Only 10 Left!
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Key Features

In Phase Kevlar Cone 2 Ohm Dual Voice Coil 1400W Peak Power Subwoofer - In Phase Car Audio XT-12

Just because it’s small don’t discount it. 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 subs really need to be heard and handled to appreciate the true quality within.

The 1400 watts peak and 400 watts RMS has been achieved by the use of 2” high-temp, four layer, aluminium voice coils, and one piece, two layer black poly-cotton spider.  

British Design

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

Enclosure Type Subwoofer

This sub is designed to be installed in an enclosure sealed or bass reflex enclosure will suffice. Open air installs can reduce power output.

Bass Reproduction

This In Phase sub offers superb bass reproduction using high quality materials. When using the right enclosure and amp, you could be hitting sub 40Hz!


The In Phase XT Series subwoofers use a Kevlar Cone technology which is far more dense than traditional paper/polyprop cones allowing the sub to endure more power. The 90oz magnet keeps the sub flexing and pushing bass waves out to a higher standard.

Power output

This sub is build for a perfect balance of SPL and SQ. So it offers a humble 400W RMS power output and 1400W Peak Power output. 

Download image of In Phase Car Audio XT-12 Click here for Image of In Phase Car Audio 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
  • Mounting Depth -150mm
  • RMS: 400
  • Peak Power: 1400
  • Fs Hz: 35.184
  • Qts: 0.513
  • Vas L: 53.632
  • Spl dB: 88.4
  • Impedance: 2Ohm
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Customer reviews

Cameron on 09/03/2021 5 star rating

Got one of these while on sale. Despite it feeling a bit lightweight it hits really hard. Running around 500w rms and 1000w peak into it with no issues at all. Would definitely recommend this at the price

What guage wire do i need for this
Redford Baines on 11/10/2020 5 star rating

What guage wire do i need for this !

Great Subwoofer
Sandip on 25/09/2019 5 star rating

Newbury Park store done me a excellent package with this subwoofer and matching Inphase amp with full installation. Cannot fault this brand. Sounds great my friends can hear me coming before i am even there!!!

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Questions/Answers About This Product
  • Question: 04 March 2022
    Car: Subaru Impreza - 1994 >

    i’m looking at buying those subs but before i do can you tell what amp i would need id like to stay with a inphase one if possible as the rest of my set is inphase


    I would personally recommend the below amplifier.

    InPhase IPA9701D 1 Ohm Stable 2400 Watts Monoblock with Subsonic Filter

    Found Useful? Yes 

  • Question: 06 February 2022
    hi in thinking of getting this sub for a build im doing but i cant find all the parameters for this sub. do you have the parameters and if so could you email them to me or tell me were i can get them


    Please see the parameters for these below.

    RMS: 400
    Peak Power: 1400
    Fs Hz: 35.184
    Qts: 0.513
    Vas L: 53.632
    Spl dB: 88.4
    Impedance: 2Ohm

    Found Useful? Yes 

  • Question: 19 October 2021
    Just to confirm what's the price as it says 89.99 but the description says less than 75?

    Am a bit confused.


    The price of this subwoofer is �89.99.

    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