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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 (79)

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

Save: £140.00 (56%)  rrp: £249.99
5 Stars
79 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
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Customer reviews

Great tight sound
NICK_Hampshire on 11/12/2020 5 star rating

As a bass player I annoy my friends with my demand for a "Tight" and well controlled bass sound when listening to music as opposed to the "Woolly" sound they generally go for! This amp/speaker combo feels appreciably heavy and substantially well-built whilst packing a controlled punch. I wouldn't hesitate to recommend this product.

Jeremy Ali on 26/10/2020 5 star rating

I had professionally installed,using the rca converter and used rca inputs,resulting in strong balanced bass from my stock system,highly recommended

Fantastic bit of kit
Carl Louis on 20/10/2020 5 star rating

I have recently purchased and installed one of these under the drivers seat of a VW Transporter and I was blown away by the all round quality of it. Nice heavy die cast Ali chasis and superb quality bass from a very small speaker. The remote is also very handy for toning it down a bit when you have the wife in the car with you moaning its too loud lol. The only con on this is the wiring diagram in the manual if wiring it high level to the existing speaker cables. It is completely wrong. When wiring high level you DO NOT need to use the blue remote turn on lead at all as the unit detects the high level signal from the speakers and turns on automatically, the blue lead is only required if wiring low level with a rca's, I wasted over an hour wiring and connecting this because it said to in the wiring diagram. Also it shows the wrong speaker connections. Ignore what is says and let common sense prevail and splice the left and right plus and minus cables to the corrosponding speaker cables and all will be well.

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Questions/Answers About This Product
  • Question: 15 January 2021
    It's fit BMW F31 under the seat???


    Please contact your local store.

    Found Useful? Yes 

  • Question: 10 January 2021
    Car: VW Passat - 2005>

    Hi if you use a wire from any speaker would that not change the impedents ?


    It depends on how it is wired in.

    Usually not.

    Found Useful? Yes 

  • Question: 29 December 2020
    Car: Vauxhall Astra - 2007>

    hi dose this need a amp to get the most out of it and if so what amp would you suggest thanks

    The USW10 has a built in Amp and comes with all teh wires you need to fit.

    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