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In Phase Car Audio USW10 300W active underseat subwooferUSW10
£99.00 Save £150.99  was:£249.99
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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 (47)

In Phase Car Audio USW10 300W active underseat subwoofer

Save: £150.99 (60%)  rrp: £249.99
5 Stars
47 Review(s) / write a review
Quickfind Code - 25817
Quick Summary:

Looking for a subwoofer that has all that bass pumping power but doesn’t need a lot of space? Look no further.

Save: £150.99 (60%)
rrp: £249.99
In Stock!
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On Orders Over £300

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

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Key Features

300W active underseat subwoofer - In Phase Car Audio USW10

Looking for a subwoofer that has all that bass pumping power but doesn’t need a lot of space? Look no further. 

With a built in amplifier powering an aluminium coned subwoofer and a max output of 300W the In Phase USW10 is a true pocket powerhouse of audio performance.

Measuring a mere 69mm in depth and 270mm in diameter, this unique unit will fit easily in just about any location in your vehicle while still packing a powerful bass punch. You may have to look a little harder to spot it but your search for a compact with impact is truly over.

Download image of In Phase Car Audio USW10 Click here for Image of In Phase Car Audio USW10
Technical Specification
  • Maximum Power Output 300W
  • Rated Power Uotput 100W
  • Output Impedance 4 Ohm + 4 Ohm
  • Crossover Frequency 50-100Hz
  • Size 270mm (D) 69mm (H)
  • Weight (inc accessories) 4.8kg
  • Phase Button (0-180 degrees)
  • Remote level Control (5m)
  • Aluminium Cone
  • Ultra Slim Design
  • Die Cast Aluminium Chassis
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Customer reviews

Singh on 29/06/2019 5 star rating

How have I not come across this before????? Sounds wicked in my Mercedes C-Class!!!

John on 15/02/2019 5 star rating

Fitted at the ilford branch in a Ford BMax. Wouldn’t fit under seat so installed in boot.Bass is a lot better when installed in boot would recommend nice bass from such a small sub.

Nicola on 15/02/2019 5 star rating

Fitted in a 64 plate Smart Fortwo at the Ilford branch. Good bass works perfect with pioneer carplay stereo able to adjust all subwoofer settings on stereo.

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Questions/Answers About This Product
  • Question: 30 January 2020
    Car: Mercedes C - Class - 2007 > (W204)

    Hi. Can you please advise on total installation cost to purchase this and have it fitted please.


    please contact your nearest store for an installation quote.


    Found Useful? Yes 

  • Question: 15 December 2019
    Car: Mercedes

    I have 1 of these and looking to add another how do I connect them. Is it 1 unit per channel like 2 mono subs. I'm using my speaker wiring so I guess I could also just double up both in stereo


    You can double up at the back of the stereo.

    Found Useful? Yes 

  • Question: 08 November 2019
    Car: Alfa Romeo Mito - 2008>

    Hi would this fit under my Alfa mito Specialai 68 plate. Both driver and passenger seats?


    Please contact your local store.

    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