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In Phase Car Audio USW10 300W Underseat Subwoofer with Wiring Kit aUSW10
£109.99 Save £140.00  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 (86)

In Phase Car Audio USW10 300W Underseat Subwoofer with Wiring Kit and Bass Remote

Save: £140.00 (56%)  rrp: £249.99
5 Stars
86 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.

Condition: New

Save: £140.00 (56%)
rrp: £249.99
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Key Features

300W Underseat Subwoofer with Wiring Kit and Bass Remote - 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
  • 10A Fuse
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Customer reviews

Very surprising little sub
Kyle Kaye on 25/11/2021 5 star rating

Bought this for my wife's car as there no boot space so only wanted a small sub up front to save the kids ears. The bass and quality of this was surprising to say the least! Easy to set up with the pre-made plug and play loom. Highly recommended

In phase usw10 excellent
LUKETOKLEY on 10/09/2021 5 star rating

After reading reviews I was unsure what to expect but needed something small to go under the passenger seat in my 2011 shape Renault trafic van. This really sounds excellent sounds like a much bigger subwoofer. I wired it in with separately bought rca wires to get better sound. Very happy I bought this subwoofer.

Inphase usw10
MIKE on 26/08/2021 4 star rating

Was sold this unnecessarily, was told my speakers in van would not be as good without it , BUT it was ,so had a refund, but the quality of it felt good but didn't install it ,didn't hear sound

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Questions/Answers About This Product
  • Question: 11 January 2022
    Car: Ford Fiesta - 2005>

    Will this subwoofer fit a Ford Fiesta 2006 Facelift with the stock 6000 CD headunit or do I need an adaptor to wire it directly in?


    Depending on the availability of space under the seat, this can be installed in your car hassle free.

    Found Useful? Yes 

  • Question: 09 January 2022
    Car: Fiat 500 - 2007>

    Hello - Can I fit this to the stock head unit on a Fiat 500 2016 model.

    Are there any additional parts needed?

    Yes the USW10 will fit onto your stock radio and any stock radio and it comes with all the wires you need to fit

    Found Useful? Yes 

  • Question: 13 November 2021
    Car: BMW 3 Series (E46) - 2005> (E90)

    If I buy this sub how much extra would it be for car audio centre to fit it. Also I have company fitted stereo.


    Our stores can provide the fitting service for you. Sadly, you have come through to the mail order centre, so we cannot give you a price for that service. Please contact them on the below emails/number for more assistance.

    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 

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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