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In Phase Car Audio In Phase BX12PL 12" Slot Ported Subwoofer EnBX12PL
£99.99 Save £20.00  was:£119.99
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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 

In Phase Car Audio In Phase BX12PL 12" Slot Ported Subwoofer Enclosure

£99.99 Save £20.00 (17%)  was:£119.99
5 Stars 5
Quickfind Code - 41905
Quick Summary:

Don't comprise your setup to save yourself a couple of pounds! Our expertly designed boxes offer phenomenal quality and performance.

Condition: New

Save £20.00 (17%)
rrp: £119.99
Only 3 Left!
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  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Easy ReturnsEasy Returns
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders before 5pm

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Key Features

In Phase 12" Slot Ported Subwoofer Enclosure - In Phase Car Audio BX12PL

Choosing a bass box can be hard as not many people sell them and ideally they need to be built by people who know subwoofer parameters, box design and understand how sound waves travel. Not to mention, have joinery knowledge.
Our expertly designed boxes will fit into a majority of vehicles. Our box's panels are 20mm thick and we use high density MDF only for enhanced durability. This enables the box to have a long life and great bass performance.
When shopping online for a box, be careful. A lot of boxes will be advertised for £15-£35 and are often made from inferior MDF and unsustainable sources. Not to mention, sealed badly. This kills off the accurate bass you are seeking
High Quality Carpet 
The Soot Black carpet has high grade fibres commonly found in industrial carpet used in offices and schools, whilst maintaining a soft to touch texture. This compliments the expert box design to go with it.  
MDF Like No Other
The box structure is fabricated from high density MDF that has similarities to high end laminate floors. Made for performance without compromise. Enjoy tight bass in your car with a proper made box. 
Binding Post
The binding post is made from high quality plastic will metal terminals plated with a gold finish. 
Instead of loose and unstable sounding bass, you can have softened bass that sounds amazing thanks to the synthetic filling. 
Slot Ported
The slot port allows bass waves to travel further giving a much louder effect.  

Download image of In Phase Car Audio BX12PL Click here for Image of In Phase Car Audio BX12PL
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Questions/Answers About This Product
  • Question: 29 April 2021
    Hello, i have an Pioneer TS-W3002D2. IS this box good for it, or not really? If not, what you guys advice to take maximum performance of the woofer?
    Thank you.


    Please contact your local store.

    Found Useful? Yes 

  • Question: 25 April 2021
    Car: Vauxhall Corsa - 2000 - 2004

    Can I fit a Alpine Car Audio Systems R-W12D2 in this box and it work well?


    Yes, you can use the Type-R subwoofer with this box. It will work well but not as good as a custom made box.

    Found Useful? Yes 

  • Question: 24 March 2021
    Car: Vauxhall Corsa - 2000-2006

    Hi a while ago i purchased from you the T Rex 12 inch 3000w subwoofer with the In Phase amp. I see you have a ported subwoofer box for sale on your site BX12PL,is this the correct box. Thanks


    You can use this box, however you are better off using a custom made box for better bass quality.

    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:

120 - 122 Alfreton Road, Nottingham, Nottinghamshire, NG7 3NR
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