Please wait...
Please wait...
Our website uses cookies so that you can place orders and we can provide a better service. Continue to use the site as normal if you're happy with this, or find out how to manage cookies.
Please wait...
In Phase Car Audio XT-8 Kevlar Cone 2 Ohm Dual Voice Coil 1000W PeaXT-8
£44.85 Save £90.14  was:£134.99
Click to Close

Fit it Yourself?

Everything you need to fit it yourself at home

Only £30.00 

With Steering Wheel Control
Only £50.00 

5 Stars (3)

In Phase Car Audio XT-8 Kevlar Cone 2 Ohm Dual Voice Coil 1000W Peak Power Subwoofer

£44.85 Save £90.14 (67%)  was:£134.99
5 Stars
3 Review(s) / write a review
Quickfind Code - 31955
Quick Summary:

In Phase XT-8 Second Generation XT Subwoofer – plenty bass without taking up much space.

Condition: New

Save £90.14 (67%)
rrp: £134.99
Only 5 Left!
Buy Now

  • 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

Click image to zoom

Key Features

Kevlar Cone 2 Ohm Dual Voice Coil 1000W Peak Power Subwoofer - In Phase Car Audio XT-8

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.

Passengers will be blown away and left questioning whether you’ve equipped the boot with a 10 or 12-inch woofer once they’ve heard this combination slam, subtlety and immediacy of bass response.

For tight, punchy, melodic bass there’s no need to listen elsewhere.  If you actually want musicality rather than outright soul destroying, window rattling, this 8-inch could be the perfect woofer for the job. 

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 300W RMS power output and 1000W Peak Power output. 

Download In Phase Car Audio XT-8 manual Click here to download manual

Download image of In Phase Car Audio XT-8 Click here for Image of In Phase Car Audio XT-8
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
  • 300 Watts RMS
  • 1000 Watts Peak handling power
  • 84.2 SPL Db
  • Mounting diametre 183mm
  • Mounting depth 127mm
Related Accessories
Please wait...
Customer reviews

my purchase experience
ian white on 09/10/2020 5 star rating

thanks for the advice from Ilford mo had one he kindly demo and I was impressed but wanted better so solution i got two now in my van it thumps hard mates are well impressed so am I its there against my 12" type r just remember to gain optimum sound build the right volume box and power with correct sub the guys here advised I took it and not disappointed

In Phase Car Audio XT-8
simon warne on 23/11/2019 5 star rating

put this in a ported box sounds great nice and crisp hits nearly all the lows for a small sub it keeps up with some big boys

charles on 04/10/2014 5 star rating

I brought two of these along with a custom slot ported box for my polo R 2013. The bass was unreal. I could not believe how low two 8" woofers would go. All my mates think i have two 12" subs. I must say the lads at Leicester made me a excellent box and gave me a cracking deal. 150% recommended!

View all reviews

Write a review
Review Title: 

How many would you give this product?

Newsletter sign up

Questions/Answers About This Product
  • Question: 14 February 2022
    Car: VW Transporter - <2004

    Hi, what size enclosure will i require for this in a sealed box please?

    Kind regards

    There is insufficient information about your vehicle.
    Please contact one of the stores below directly.

    Car Audio Centre Nottingham
    542 Mansfield road,
    NG5 2FR
    0115 845 3462

    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: 01 May 2021
    Car: Ford Focus - <2004

    What amplifier would i need to power 2 of these, i would like one 4 channel amp for 2 mids aswell as these subs, if its possible, havent got mids yet so anything u advise, thanks


    You wouldn't be able to use a 4 channel amp with these and power door speakers. The OHM load would be too much bridged. If you drop it to 8ohm, the power will not be sufficient. So go for the below (remove SRC6 if you have an aftermarket headunit with 3 preouts)

    InPhase IPA8701D 1 Ohm Stable 1600 Watts Monoblock with Subsonic Filter
    In Phase IPA601 2 Channel 2 Ohm Stable Amplifier with Subsonic Filter
    JWTRU422D 4 Gauge 2500W Amplifier Wiring Kit for Installing 2 Amplifiers
    SRC6 6-Channel Active Hi to Low Frequency Converter

    Found Useful? Yes 

  • Question: 19 February 2021
    Car: Hyundai i40 - 2011>

    Hi, will this work in a freeair installation, onto the rear deck of my hyundai i40 sedan? Or will it just burst? If not, Could you give me a better option for a free air operating subwoofer? Cheers!


    You are better using the below listed subwoofer.

    USW12 Dual underseat active subwoofer system 600 watts with bass and phase wired remote control

    Found Useful? Yes 

  • View All
Got a Question about this Product?

The email address is required to email you when your question has been answered

Car Make
Car Model

chars left

Newsletter sign up

N.B. Questions are answered during office hours
Please don't put sensitive info in the question.

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

Owner's Manual