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In Phase Car Audio USW8 - 300W Diecast Aluminium Compact Underseat USW8
£109.99 Save £90.00  was:£199.99
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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 (8)

In Phase Car Audio USW8 - 300W Diecast Aluminium Compact Underseat Subwoofer

Save: £90.00 (45%)  rrp: £199.99
5 Stars
8 Review(s) / write a review
Quickfind Code - 32912
Quick Summary:

Compact, powerful, discreet and built to last.

Save: £90.00 (45%)
rrp: £199.99
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 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 Diecast Aluminium Compact Underseat Subwoofer - In Phase Car Audio USW8

Compact, powerful, discreet and built to last. The USW8 is the new addition to the In Phase USW series range. As with all the other USW series models this USW8 can really stand proud in a tough market with impressive specs and unrivalled build quality. Constructed from Die-cast through out it can be placed under the seat and you can rest assured it wont come to any harm, allowing you to sit back and enjoy the superior sound that you would expect from the In Phase product. The included wired remote gives you full control at your finger tips allowing you to control Gain and Freq response and even phase adjust.

Download image of In Phase Car Audio USW8 Click here for Image of In Phase Car Audio USW8
Technical Specification
General Features:
  • Max power 300W
  • Rated power 100w
  • 6" Aluminium cone
  • Die Cast aluminium chassis
  • Ultra slim design
  • High level signal input
  • Wired remote control
  • Power indication
  • Protection indicator
  • Phase button (0-180)
  • RCA Input terminals
  • Remote level control (5m)
  • Dimensions 289mm(w) x 220mm(H) x 75mm(D)
  • Weight (inc accessories) 4.4KG
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Customer reviews

Great Starter upgrade
Javid on 29/06/2019 5 star rating

I bought this for my Corsa 2011. This is my first car and the sound system is crap. This and the XTC17.2 speakers sound so good in my vehicle. I would like to say I'm a basshead and love bassline and DnB. But sometimes I fancy a bit of Adele! Captures the high notes really well!

John Guccie on 04/04/2019 5 star rating

Top product, well designed.

surprisingly good
Eddie Wray on 27/08/2018 5 star rating

Better than expected, v.compact yet powerful, ample for a car for most people. Quality feels v.good. I mounted it in a motorhome and am happy with it. 'Gain' remote control works v.well :). Seller slow in dispatching :(

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Questions/Answers About This Product
  • Question: 28 February 2019
    Car: Ford Transit - 2005 >

    Do you need an amplifier with this or has it got one built in?


    no this product has the amplifier built in, so you wouldn't require an external one

    Found Useful? Yes 

  • Question: 14 February 2019
    Car: Ford Focus - 2004>

    What is the difference between this unit and the USW10?


    they are pretty much the same the main difference is the footprint size of the products.

    they have the same power as each other and the same size of subwoofer

    Found Useful? Yes 

  • Question: 13 January 2019
    Car: VW Golf - 2003 > MK5

    I have a Golf mk7. Have bought the Inphase usw8 sub and was wondering to where I need to connect the Remote On wire?
    Many thanks


    Please contact your local store.

    Found Useful? Yes 

  • View All
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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