Please wait...
Please wait...
Our website uses cookies so that you can place orders and we can provide a better service. Continue to use the site as normal if you're happy with this, or find out how to manage cookies.
Please wait...
In Phase USW8 - 300W Diecast Aluminium Compact Underseat SubwooferUSW8
£99.99 Save £100.00  was:£199.99
Click to Close

Fit it Yourself?

Everything you need to fit it yourself at home

Only £30.00 

With Steering Wheel Control
Only £50.00 

5 Stars (5)

In Phase USW8 - 300W Diecast Aluminium Compact Underseat Subwoofer

Save: £100.00 (50%)  rrp: £199.99
5 Stars
5 Review(s) / write a review
Quickfind Code - 32912
Quick Summary:

Compact, powerful, discreet and built to last.

Save: £100.00 (50%)
rrp: £199.99
In Stock!
Buy Now

Finance Available
On Orders Over £500

  • 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

Click image to zoom

Key Features

300W Diecast Aluminium Compact Underseat Subwoofer - In Phase 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 USW8 Click here for Image of In Phase 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
Please wait...
Customer reviews

Great for the money
Dean on 11/05/2018 5 star rating

Just installed this behind my passenger seat in my mx5. (will not fit under the seat) The difference in sound is amazing. The sound was always lacking even with aftermarket stereo and speakers, especially with the roof down. Now everything is clear at high speeds with the roof down.

Highly recommend
Daniel on 07/12/2017 5 star rating

Comes with pretty much everything needed for fitting and was really easy to install, have it mounted up in my passenger foot well as comes with tabs to be screwed down, sound is great and is much more than expected, obviously as so close to you doesn't need to be turned all the way up meaning it doesn't rattle everything inside and out! Highly recommend

David on 10/11/2016 5 star rating

This little active subwoofer produce so much bass it's unbelievable. I had it installed in my smart car from the ilford store. They installed it for me while i waited. Installation was nice and tidy. Remote controller mounted so it can be accessible easily. Promised to leave them a 5 star review so here it is Guys.

View all reviews

Write a review
Review Title: 

How many would you give this product?

Newsletter sign up

Questions/Answers About This Product
  • Question: 19 June 2018
    Car: Mazda MX-5 - 1990 - 2000

    Will it need a low frequency input? Or just standard left and right rca/Phono connection?

    if you have a aftermarket radio then use a phono if you dont then use the high level input built into the product

    Found Useful? Yes 

  • Question: 14 June 2018
    Car: Nissan Qashqai - 2007>

    Would this fit under the drivers seat.
    Many thanks

    without measuring the location its hard to tell, i would recommend to visit the store and try one

    Found Useful? Yes 

  • Question: 12 June 2018
    Hi I have 54 reg 206, how difficult is it to wire up? also does it come with instructions?

    the subwoofer does come with some instructions but they arent specific to your vehicle, i would recommend if you dont have experience installing a subwoofer to seek professional installation

    Found Useful? Yes 

  • View All
Got a Question about this Product?

The email address is required to email you when your question has been answered

Car Make
Car Model

chars left

Newsletter sign up

N.B. Questions are answered during office hours
Please don't put sensitive info in the question.

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