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In Phase Car Audio SXT6435 - 4x6" neodymium 3-way coaxial speakSXT6435
£29.99 Save £40.00  was:£69.99
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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 

4 Stars (5)

In Phase Car Audio SXT6435 - 4x6" neodymium 3-way coaxial speakers - 200 watts

£29.99 Save £40.00 (57%)  was:£69.99
4 Stars
5 Review(s) / write a review
Quickfind Code - 32228
Quick Summary:

These hyper-efficient In Phase SXT6435 speakers deliver a big, big sound even in the smallest of spaces. 200 watts of crystal clear sound with rich deep bass busts out of these slimline speakers, making them ideal where fitting space is at a premium.

Save £40.00 (57%)
rrp: £69.99
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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

4x6" neodymium 3way coaxial speakers 200 watts - In Phase Car Audio SXT6435

Efficiency is the name of the game for these In Phase SXT6435 3-way coaxial slimline speakers. The latest neodymium technology delivers extraordinarily rich bass, midrange and high end tone. Yet the slimline styling makes them easy to install in any car – even where space is short.


3-way speaker options – swivel, flush and surface – ensure crystal clarity for the driver and passengers alike. This great value, powerful package comes complete with discreet grills, plenty of speaker cable and all the fixings you need for a stress-free installation.

Download image of In Phase Car Audio SXT6435 Click here for Image of In Phase Car Audio SXT6435
Technical Specification
  • Peak power handling 200 watts
  • RMS power 30 watts
  • Deep bass – 6x4” neodymium cone
  • Butyl rubber surround
  • 1” high temperature voice coil
  • Active midrange – ½” PEI neodymium dome
  • Sharp high end – ½” Piezo tweeter
  • 3-way mounting: swivel, flush and surface
  • Mounting depth 35mm
  • Cut-out 153mm x 90mm
  • Includes grills, cables, fixings and instructions
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Customer reviews

Great for the Price!
Jon on 02/12/2019 5 star rating

I fit these all the time as i am a mobile auto electrician. I fit the 17CM and 10CM versions of these. For the price, you can't go wrong :)

So dissapointed
Martin on 20/06/2018 1 star rating

After reading the other reviews I was at expecting something that was at least as good as the 22 year old standard door speakers in my car. I'm sorry to say these were a HUGE disappointment. There is literally almost no bottom-end whatsoever. And just to be clear I'm in no way expecting pounding bass from little 4x6 speakers, I just want a reasonably full and rounded sound. It's odd - the packaging and construction seem spot-on, but acoustically these are a massive downgrade from the cheap factory speakers that were in before. Most upsettingly I had to permanently modify the opening to fit these new speakers (the steel pressing is about 5mm wider where it meets the door fitting than the standard speakers) so I cannot now revert back. I was just so convinced by the reviews and the presentation that they would be an improvement I thought nothing of it. Not a great first experience of Car Audio Centre, if I'm honest.

Very good upgrade
Rajan on 02/11/2015 5 star rating

Hi guys just a quick thank you for the speakers you installed into my van. They do exactly what you said and sound so much better than my factory setup. Definately recommend these inphase speakers.

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Questions/Answers About This Product
  • Question: 14 May 2017
    I need to fit a pair of 4x6"into a classic car. i see the description says they come with grills, is there a picture of the grills anywhere? Also can you tell me what the frequency response range is p


    thanks for your questions, unfortunately this answering facility does not allow for us to send photographic detail you may be able to get more help from our online team at Inphase & for the frequency response information also.

    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