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In Phase USW10 300W active underseat subwooferUSW10
£149.99 Save £100.00  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 (43)

In Phase USW10 300W active underseat subwoofer

Save: £100.00 (40%)  rrp: £249.99
5 Stars
43 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: £100.00 (40%)
rrp: £249.99
In Stock!
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  • 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 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 USW10 Click here for Image of In Phase 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

Nice sound
Liam Hares on 30/05/2018 5 star rating

Dropped by the Ilford branch, they were really helpful polite guys, a really good punchy sub, fits nicely under the seat.

Great bass with minimal space.
Graeme on 03/09/2017 5 star rating

I've just upgraded the sound system on my wife's Boxster and had a hard time looking for a compact bass unit with good low punch, until I came across the In Phase USW10 (arrived 2 days ago - thanks for the quick delivery CAC) Best fitting area is on the passenger foot well. Also comes with a handy little bass control knob that sits on the dashboard.

Majed on 03/08/2017 5 star rating

Recently popped into the Ilford branch and was advised to go with this Subwoofer and not the one I had actually ordered and was delivered to my house. I cannot fault their expert advise as everything he told me about this Subwoofer is spot on! If you need the missing piece to your puzzle then this is it! Compact enough to fit under my new 2017 Smart ForTwo and powerful enough to give me that extra grunt needed with the low-end bass.

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Questions/Answers About This Product
  • Question: 28 October 2018
    Car: BMW 3 Series (E46) - 2005> (E90)

    Hi.I would like to upgrade my underseat BMW there ones that can just go straight in.thanks


    You will need the below underseat subwoofers for your BMW.

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

    Found Useful? Yes 

  • Question: 15 September 2018
    Car: BMW X5 (E53) - 2006> (E70)

    I’m looking for more sound quality in my X5. I’ve been looking at some under seat sub woofers as I don’t want to use up to much boot space. Can you please advise...


    The USW10 can be mounted in one of the side panels in your BMW X5. I would suggest you contact your local store.

    Found Useful? Yes 

  • Question: 17 July 2018
    Car: Seat Altea - 2004>

    Hi there. I am specifically interested in what kind of bus or interface this uses for power and remote connectivity. Could it be powered by way of a mains to 12V adaptor for use on mains? Thanks


    this product requires a 12volt power rated at 10amps, remote turn on which is also 12volts and an earth! also requires RCA signal input

    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