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In Phase Car Audio USW10 300W active underseat subwooferUSW10
£124.99 Save £125.00  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: £125.00 (50%)  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: £125.00 (50%)
rrp: £249.99
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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 order before 5pm Next Day Delivery available on all order 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: 11 June 2019
    Car: Ford Focus - 2004>

    Hi I have a Ford Focus 2015 model. Can this sub be installed on my vehicle, if so can you please email me with the cost?



    yes it can be installed on your vehicle however for costs please contact the store you wish to visit as we cannot issue quotes on their behalf.


    Found Useful? Yes 

  • Question: 22 May 2019
    Car: BMW 3 Series (E46) - 2005> (E90)

    Will the underseat sub In phase usw 10 fit bmw 3 series convertible 2011 both front seats


    unfortunately the Inphase USW10 will not fit under your BMW 3Series Convertible 2011.

    You Can upgrade the factory underseat subwoofers in your BMW 3Series Convertible 2011, i have listed the upgrades below.

    IFBMW-SUB Integration Dedicated 2-Way Subwoofer Kit - BMW 1/3/X3

    Found Useful? Yes 

  • Question: 26 February 2019
    Car: Toyota RAV4 - 2006>

    Does this fit under my seat and wld I need one under both front seats?


    you would need to measure the underseat location to know if the items would fit, measure under both seats as most cars arent identical on both sides, installation of two of these would be ideal as then you will have bass that fills the car rather than than having the bass off centre to one side of the vehicle.

    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