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In Phase Car Audio USW12 Dual underseat active subwoofer system 600USW12
£199.00 Save £100.99  was:£299.99
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5 Stars (22)

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

Save: £100.99 (34%)  rrp: £299.99
5 Stars
22 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: £100.99 (34%)
rrp: £299.99
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  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders 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 Car Audio 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 Car Audio USW12 Click here for Image of In Phase Car Audio USW12
Technical Specification
Features and Spec
  • Max power 600 watts (300W x2)
  • 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

Quality Product
Jay on 11/11/2019 5 star rating

Was shown this by Mohammed at the Ilford branch. I heard this compact subwoofer in action already in my friends car. Mohammed done a great package for me including installation. Highly recommend the store and staff

Compact with amazing bass response
adam on 08/11/2019 5 star rating

read the reviews online about this product and headed down to the tooting store to have a look at it. one of the guys at the store kindly demonstrated his usw12 in his car for me as he had one fitted in his car, i brought it straight away!

Best Sub i have ever heard
Martyn on 10/10/2019 5 star rating

OMG this sub woofer is so loud, i love the small size and big sound, easy to fit and has made a massive improvement to my system.

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Questions/Answers About This Product
  • Question: 14 January 2020
    Car: VW Transporter - 2005 >

    What is the RMS rating on this?
    Does it come with the necessary cables to install it?
    Is there a remote control included?
    Regards Josh


    it comes with the required cables and remote control. rms rating would be around 100-200

    Found Useful? Yes 

  • Question: 24 November 2019
    Car: Vauxhall Insignia - 2009>

    Insignia 2012 will fit this sub under seat?!


    Please contact your local store.

    Found Useful? Yes 

  • Question: 23 July 2019
    Car: Ford Focus - 2004>

    Hi, would this fit under the front passenger seat of a Ford focus 2016 mk3.5?

    Many thanks.


    we would need to know the measurements of the underseat location to know if this item would fit, here are the Dimensions 380mm (w) x 285mm (h) x 75mm (d)

    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