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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 (17)

In Phase USW12 Dual underseat active subwoofer system 600 watts with bass and phase wired remote control

Save: £120.00 (34%)  rrp: £349.99
5 Stars
17 Review(s) / write a review
Quickfind Code - 31934
Quick Summary:

In Phase USW12 Dual underseat active subwoofer system 600 watts with bass and phase wired remote control for a discrete solution to achieve bass

Save: £120.00 (34%)
rrp: £349.99
This product has been discontinued

  • 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

Dual underseat active subwoofer system 600 watts with bass and phase wired remote control - In Phase USW12

In Phase USW12 dual active subwoofer enclosure:

After the colossal success of its now little brother the USW10, In Phase have been busy developing another compact subwoofer system to set a new bench mark for the compact subwoofer market. The USW12 is in keeping with the USW10`s robust yet refined design and heavy duty die cast aluminium chassis construction delivering double the punch! Boasting a dual subwoofer system producing 600 watts peak power. Its ultra slim design to house the 2 dual 6' aluminium cone sub bass drivers has been achieved by using a DieCast Aluminium chassis which also provides a heavy duty and durable construction, Allowing you to install the USW12 anywhere within your vehicles Boot, Underseat, behind seat and foot wells. It also comes with its own specifically designed cable kit which offers an easy installation and 2 options for either aftermarket stereo installation or factory fitted stereos if without RCA output, This is achieved with a Hi-Level input option. Full control has also been achieved by the advanced addition of the wired remote control which allows you to control both bass gain and phase control. This woofer system delivers bass like no other compact solution, tested against brands such as Focal, Pioneer and Alpine the In Phase USW12 delivers an uncompromised real deep and accurate subwoofer response like a 12” subwoofer system. IT MUST BE HEARD.

Download image of In Phase USW12 Click here for Image of In Phase USW12
Technical Specification
Features and Spec
  • Max power 600 watts (150W x 4)
  • Dual 6" Bass drivers
  • Die Cast Aluminium chassis
  • Ultra slim design
  • Phase button (0-180) Via remote control
  • RCA input terminals
  • High Level input
  • Remote control wired (5M)
  • Dimensions 380mm (w) x 285mm (h) x 75mm (d)
  • Weight 6.9Kg inc accessories
  • Output inpedance 2Ohm + 2Ohm + 2Ohm + 2Ohm
  • Crossover Frequency 50-100Hz
  • Signal to Noise - 60dB
  • Max current consumption 12A
  • Source voltage 14.4 (10V-16V)
  • Sensitivity (disortion level 1%) RCA input 50mV - 0.2V
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Customer reviews

Love it!
Greg on 08/01/2016 5 star rating

Love this so much! Installed in the boot of my 2003 MINI and it packs a big punch for its size! Couldn't be happier with it! Wired in in around 45mins/hour at work. Great price and sound! Awesome fact it has a remote to control bass gain and phase control! Would highly recommend for small cars like mine! Works brilliantly with inPhase front speakers in the front :D

ok kind of sub for smaller systems
Paul on 28/10/2015 3 star rating

Sub would be ok for adding bass to smaller systems, but in mine when I add gain to hear the sub it distorts and rattles. Should have gone for a box or tube sub

Jay on 27/10/2015 5 star rating

I can't believe how much bass this little thing puts out, ok not ground shaking but very impressive for the size of the woofer. My top purchase of the year without a doubt. Very happy, thanks guys. Jay

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Questions/Answers About This Product
  • Question: 23 May 2017
    Car: Peugeot 308 - 2007>

    Can you also install product?


    #thanks for your question, we do installations at all of our Car Audio Centres.

    Found Useful? Yes 

  • Question: 01 May 2017
    Car: Subaru Impreza - 2007>

    Will fit under the seat in my 2008 Impreza hatchback?


    Thanks for your question, the USW12 can be fitted but you would need at least 3 1/2 - 4 inches clearance under the seat so that it does not get caught on the seat mechanism

    Found Useful? Yes 

  • Question: 27 April 2017
    Car: Citroen C1 - 2005>

    Hi is there any chance that you know if this would fit under the passenger seat of a c2?


    Please contact or visit your local store to try it.

    Found Useful? Yes 

  • View All
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