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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 (8)

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

£39.99 Save £30.00 (43%)  was:£69.99
5 Stars
8 Review(s) / write a review
Quickfind Code - 32228
Quick Summary:

The In Phase SXT 6435 makes use of a larger surface area giving than a conventional speaker, as a result more bass in a confined space. Using the new Shallow Mount Technology makes for easy installation. These speaker are a great upgrade in any car.

Condition: New

Save £30.00 (43%)
rrp: £69.99
This product has been discontinued

  • 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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Sorry, this product has been discontinued. We recommend the following product.

Alpine Car Audio Systems SXE-4625S 150W 6" x 4" 2-way speakers
Alpine Car Audio Systems SXE-4625S

Key Features

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

In Phase are proud to launch the newest series of SXT speakers, a no comprise design giving true performance from minimum amounts of power so great for those who needs speaker upgrades without adding amplifiers. Pushing the inventiveness of design InPhase have used an inverted magnet to make the new series shallow mounting dept, allowing for easy installation in most cars.
Using 3-Way speaker combination gives for translucent highs while our Poly-Mica coated cone with Butyl rubber surround produces effortless deep rich accurate bass. 

These speakers are an essential upgrade for any car audio system. Complete with discreet grills, speaker cable and all speaker fixings for a no stress installation.The perfect speaker upgrade in any car.

British Design

All In Phase SPX, XTC and SXT speakers are designed in the UK utilising over 30 years of audio experience to create a sound that is right for you.

Coaxial Design

Coaxial speakers or full range speakers as they are also known as offer higher quality sound than their dual cone counterparts. The tweet at the helm of the cone allows higher end frequencies (high notes) to be distributed out. This also does not require a separate crossover to fit them.

Poly-Mica coated cone, Butyl Rubber surround and Aluminium Chassis

Poly-Mica is a budget friendly, plastic speaker cone. When combined with Butyl Rubber surround, a high quality spider and decent shallow magnet, you have a budget friendly shallow mounted speaker which produces beautiful high notes and resonant bass notes.

Low to Medium Power

These speakers allow up to 30W RMS to each speaker and 200W peak power . Which is fairly high for shallow mounting 6x4" speakers! These speakers can be run on your headunit or via a separate amplifier. These speakers are designed for tight spaced doors or areas. They do no require high power to produce beautiful sound.

These Car Audio Speakers Come in Pairs

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
Related Accessories
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Customer reviews

Iveco Daily Replacement
MARTIN on 15/04/2021 5 star rating

These speakers replaced the factory fitted speakers in my Iveco Daily. Easy fit into existing spaces. A little trimming of the plastic surround on 1 to get a perfect flat fit. Good sound quality at a good price.

Factory upgrade
Ella on 08/12/2020 5 star rating

I treated my mum to these, they sound great. She noticed the difference immediately. At first she thought she was going deaf. I told her she needed new speakers! We both think they are great value.

Great upgrade
Mickey on 10/05/2020 5 star rating

I fitted these in my Xr2 in the back as the facory speakers gave up. I know why the other guy did not get bass! He wired the speakers out of phase. Simple. I did too and then read the instructions and noticed I did not check the positive or negative speaker connection. My mate just changed the wires and we got bass. Still dont know if we have wired them right but they work great!

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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 

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