BMW Audio Upgrade

Check out our BMW Sound System Upgrade Packages below!

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Take your BMW audio system to new heights.

Choose your setup and commence your journey into extraordinary sound.

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Level 1 Package

Perfect for a clarity upgrade with an OEM look

£730

Duration of installation: 1 Day

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Purchase includes:

Audison Prima 2 way front speakers

10 sheets of Skinz sound proofing

BMW Tweeter Grills - Some vehicles need this (Normally between £50-£180 additional)

Professional pictures

Optional Extras:

Additional sound deadening - see options here

*Bass options that can be added to this package!

Audison Prima 10” active sub with 5 sheets of sound proofing - £998 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a traditional box powered by Audison Forza AF M1D with 10 sheets of sound proofing - £1750 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2350 inc installation

Hertz Mille Legend 10’’ sub mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2650 inc installation

Warranty:

All of our installs have lifetime warranty on our craftsmanship

Level 2 Package

Perfect option for those looking to do a bigger system in the future

£1,450

Duration of installation: 3 Days

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Purchase includes:

Audison Prima 2 way front speakers

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

15 sheets of Skinz sound proofing

BMW Tweeter Grills - Some vehicles need this (Normally between £50-£180 additional)

Professional pictures

Optional Extras:

Additional sound deadening - see options here

*Bass options that can be added to this package!

Audison Prima 10” active sub with 5 sheets of sound proofing - £998 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a traditional box powered by Audison Forza AF M1D with 10 sheets of sound proofing - £1750 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2350 inc installation

Hertz Mille Legend 10’’ sub mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2650 inc installation

Warranty:

All of our installs have lifetime warranty on our craftsmanship

Level 3 package

Perfect for a volume, clarity and bass upgrade with an OEM look

£2,725

Duration of installation: 5 Days

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Purchase includes:

Audison Prima 2 way front speakers

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

17 sheets of Skinz sound proofing

Audison SR 5.600 V2 – Amplifier

Connection grade wiring

BMW Tweeter Grills - Some vehicles need this (Normally between £50-£180 additional)

Professional pictures of the install

Professional video of the install

Optional Extras:

Additional sound deadening - see options here

*Bass options that can be added to this package!

Audison Prima 10” active sub with 5 sheets of sound proofing - £998 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a traditional box powered by Audison Forza AF M1D with 10 sheets of sound proofing - £1750 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2350 inc installation

Hertz Mille Legend 10’’ sub mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2650 inc installation

Warranty:

All of our installs have lifetime warranty on our craftsmanship

Black frame for package

Purchase Includes:

Audison Prima 2 way front speakers

Audison Prima rear speakers

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

40 sheets of Skinz sound proofing

Audison Forza AFM12.14 – Amplifier

Connection grade wiring

BMW Tweeter Grills - Some vehicles need this (Normally between £50-£180 additional)

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

 Audison Forza DRC AC: £145

 Audison bit B-Con: £245

Additional sound deadening - see options here

*Bass options that can be added to this package!

Audison Prima 10” active sub with 5 sheets of sound proofing - £998 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a traditional box powered by Audison Forza AF M1D with 10 sheets of sound proofing - £1750 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2350 inc installation

Hertz Mille Legend 10’’ sub mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2650 inc installation

Warranty:

All of our installs have lifetime warranty on our craftsmanship

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Level 4 most popular package

Perfect for OEM look surround sound with a custom tuning session

£4,100

Duration of installation: 8 Days

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Level 5 package

Perfect surround sound system setup if you have Harmon Kardon

£4,795

Duration of installation: 9 Days

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Purchase Includes:

Audison Prima 2 way front speakers

Audison Prima rear speakers

Audison Prima rear surround speakers

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

50 sheets of Skinz sound proofing

Audison Forza AFM12.14 – Amplifier

Connection grade wiring

BMW Tweeter Grills - Some vehicles need this (Normally between £50-£180 additional)

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

Optical Module: £649

Audison Forza DRC AC: £145

Audison bit B-Con: £245

Additional sound deadening - see options here

*Bass options that can be added to this package!

Audison Prima 10” active sub with 5 sheets of sound proofing - £998 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a traditional box powered by Audison Forza AF M1D with 10 sheets of sound proofing - £1750 inc installation

Hertz Mille Pro 10’’ sub - shallow or deep mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2350 inc installation

Hertz Mille Legend 10’’ sub mounted in a custom box powered by Audison Forza AF M1D with 15 sheets of sound proofing - £2650 inc installation

Warranty:

All of our installs have lifetime warranty on our craftsmanship

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Level 6 package

Perfect for a complete custom surround sound upgrade with a bespoke tuning session

£7,200

Duration of installation: 17 Days

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Purchase Includes:

Audison Thesis tweeter

Audison Prima 4’’ mid range

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

50 sheets of Skinz sound proofing

Custom A-pillars

Audison Prima rear speakers

Audison Forza AFM12.14 – Amplifier

Audison Forza AP F1D – Amplifier

Signal summing device

Connection Grade wiring

Hertz Mille Pro 10'' sub

Traditional Sub Box

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

Optical Module: £649

Audison Forza DRC AC: £145

Audison bit B-Con: £245

Additional sound deadening - see options here

Warranty:

All of our installs have lifetime warranty on our craftsmanship

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Purchase Includes:

Audison Thesis tweeter

Audison Voce 3’ mid range

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

50 sheets of Skinz sound proofing

Custom A-pillars

Audison Prima rear speakers

Hertz mille power 4– Amplifier

Hertz mille power 5– Amplifier

Hertz mille power 4– Amplifier

Signal summing device

Audison Virtuoso Processor

Connection Grade wiring

Hertz Mille legend 10'' sub

Custom Sub Box

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

Optical Module: £649

Audison Forza DRC AC: £145

Audison bit B-Con: £245

Additional sound deadening - see options here

Warranty:

All of our installs have lifetime warranty on our craftsmanship

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Level 7 package

Perfect for those who have a relentless pursuit of excellence.

£11,900

Duration of installation: 30 Days

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Level 8 package

Ideal for perfectionists who won't compromise on quality.

£18,950

Duration of installation: 33 Days

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Purchase Includes:

Audison Thesis tweeter

Audison Thesis 3’’ mid-range

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

90 sheets of Skinz sound proofing

Custom A-pillars

Audison Prima rear speakers

Audison Voce 4ch Amp

Audison Voce 4ch Amp

Audison Voce 1ch Amp

Audison Voce 1ch Amp

Signal summing device

Audison Virtuoso Processor

Connection Grade wiring

Hertz Mille Legend 10'' sub

Hertz Mille Legend 10'' sub

Custom Sub Box x 2

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

Optical Module: £649

Audison Forza DRC AC: £145

Audison bit B-Con: £245

Additional sound deadening - see options here

Warranty:

All of our installs have lifetime warranty on our craftsmanship

Level 9 package

Designed for those with an unwavering commitment to excellence.

£46,300

Duration of installation: 40 Days

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Purchase Includes:

Audison Thesis Tweeter

Audison Thesis Mid Range

Audison Thesis Mid Bass

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

100 sheets of Skinz sound proofing

Custom A-pillars

Hertz Mille Legend rear speakers

Audison Voce 5ch Amp

Audison Thesis 4ch Amp

AUDISON THESIS VENTI (The £10k Amp)

Audio Control signal summing device

Audison Virtuoso Processor

Connection Grade wiring

Hertz Mille Legend 10'' sub

Hertz Mille Legend 10'' sub

Custom Sub Box x 2

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

Optical Module: £649

Audison Forza DRC AC: £145

Audison bit B-Con: £245

 Additional sound deadening - see options here

Warranty:

All of our installs have lifetime warranty on our craftsmanship

Purchase Includes:

3 Audison Thesis Venti (The £10k Amp)

2 Audison Thesis Uno

Audison Thesis Quattro

120 sheets of Skinz sound proofing

Audison Thesis Tweeters

Audison Thesis Mid Range

Audison Thesis Mid Bass

Audison Prima 8″ under seat subwoofer – Passenger side

Audison Prima 8″ under seat subwoofer – Driver side

Custom A-pillars

Audison Thesis rear speakers

Audio Control signal summing device

Audison Virtuoso Processor

Connection Grade wiring

Hertz Mille Legend 10'' sub

Hertz Mille Legend 10'' sub

Custom Sub Box x2

Tuning & EQ

Professional pictures

Professional video of the install

Optional Extras:

Optical Module: £649

Audison Forza DRC AC: £145

Audison bit B-Con: £245

 Additional sound deadening - see options here

Warranty:

All of our installs have lifetime warranty on our craftsmanship

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level 10 package

Ideal for individuals who refuse to accept anything less than perfection.

£124,178

Duration of installation: 60 Days

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Harmon Kardon VS Audison

In the world of high-fidelity sound, the names Harman Kardon and Audison often feature prominently. Each brand has a unique history, approach to design, and set of offerings that satisfy different segments of the audio market. This comparison explores key differences and similarities between Harman Kardon and Audison to help you make an informed decision.

In this video we discuss and explain all there is to know about audio upgrades on BMWs, if you are looking to learn more and looking for some help on what system to choose, this video should help you massively.

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BMW M5 Sound System Upgrade

Experience an unparalleled BMW M5 F90 sound system upgrade that maintains the factory look while featuring top-notch Audison components. In this video, we completely transform our BMW M5 F90 demo car's audio system, showcasing the remarkable enhancements without altering its sleek interior design.

As experts in high-end car audio for BMWs, the team at Cambridge Car Audio presents a detailed walkthrough of this extraordinary BMW audio upgrade process. Whether you're looking to enhance the sound quality of your BMW's speakers, stereo system, or even install a custom sound system with an amplifier and subwoofer, this video has you covered.

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Not sure what system to choose?

This video is a great one for those of you who want to learn more about how we choose systems and may help you understand more about your BMW audio upgrade.

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BMW M135i Sound System Upgrade

BMW M135i sound system upgrade by Cambridge Car Audio! Watch this premium car audio installation with BMW speaker upgrade, better bass, crystal-clear sound & expert audio tuning in the UK.

In this video, our expert technicians at Cambridge Car Audio take on a full BMW M135i audio upgrade, featuring high-performance component speakers, custom subwoofer integration, and precise tuning for immersive sound. Whether you're into car audio upgrades, BMW stereo enhancements, or want to learn how we transform stock systems into audiophile-grade experiences—this one's for you.

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Demo car available

Experience the ultimate sound system before you buy.

At Cambridge Car Audio, we understand that hearing is believing. That’s why we’ve built a dedicated demo car – a stunning BMW M5 – equipped with one of our signature high-end audio systems.

This vehicle is available for you to sit in, listen to, and truly experience the difference that a professionally installed sound system can make. Whether you're considering a full audio upgrade or just want to explore the options, this is the perfect way to hear what’s possible.

Come and experience it for yourself – no guesswork, just sound.

Book your demo

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Frequently asked questions

  • This varies depending on the system, the level of fabrication required and the size of the job. For clarity, we list estimated timescales on each of our packages. We believe in doing the job once and doing it properly — not rushing it. A consultation will give you a realistic timeframe for your specific vehicle.

  • Yes. We design all systems in a fully reversible way using quality connectors and 3D-printed adapters. That means when it’s time to change cars, we can remove the system cleanly and re-install it in your new vehicle.

  • Yes. Most of our clients start with a consultation. You can see and hear our demo cars, get a tour of our facility, and we’ll build a system that suits your goals, your vehicle and your budget.

  • We have clients from all over the UK — including London, Birmingham, Manchester and even Scotland. Many travel several hours because they want their installation done once, and done right. We also offer hire cars and can help with transport if required.

  • Yes, we have many clients from Europe, the Middle East and the USA who ship their vehicles to us for audio upgrades. If you’re based internationally, we can help arrange transport and coordinate your installation from start to finish.

  • Sound deadening transforms how a car sounds. By reducing road noise, panel vibration and resonance, it allows the system to deliver clearer sound and better bass. It also makes everyday driving more enjoyable — even when the system’s not turned up.

  • A passive system uses crossovers to split the audio signal after it leaves the amplifier. A fully active system gives each speaker its own amplifier channel, allowing far more control over tuning and sound quality. Active systems deliver more clarity, precision and adjustability — perfect for high-end installations.

  • A DSP (Digital Signal Processor) allows us to precisely time-align, EQ and tune your system for your specific car and seating position. It helps remove peaks, dips and reflections caused by the vehicle’s shape. The result is clean, balanced and incredibly detailed sound.

  • We follow a clear, structured process so the system sounds amazing in your exact car and for your taste in music.

    1. Measure the factory system — we analyse your OEM setup with calibrated microphones and REW (Room EQ Wizard).

    2. Configure the new system — we set gains, crossovers and polarity so everything performs correctly.

    3. Precision DSP tuning — we bring the REW data into our DSP software, time-align each speaker and apply EQ for a balanced sound.

    4. Tune to your music — using your favourite tracks, we fine-tune by ear for tone, staging and detail.

  • No. We use modern, efficient equipment designed with EVs in mind. The systems we install have minimal power draw, so your driving range isn’t affected.

  • We offer a lifetime warranty on all our workmanship. If anything fails due to how it was installed, we’ll put it right.
    All parts are covered by the manufacturer’s warranty, typically between 2 and 5 years. We’ll also help handle any valid claims with the supplier to make the process smooth.

  • Yes. We have multiple demo cars on site so you can experience different levels of audio systems in person. It’s the best way to understand the difference a proper system makes.

  • Transparency is standard here. We document your installation with step-by-step photos and short videos, so you can see exactly what was done and how it was done. We can include serial numbers for key components, wiring and fabrication progress, and snapshots of DSP/REW settings used during tuning. You’ll receive this media as a record of the work — it’s one of the big reasons clients choose us.

  • We’re a large, experienced team working from an 11,000 sq ft purpose-built facility. Every bay has custom racking so parts removed from your vehicle are stored safely. There’s plenty of space around each car, reducing risk and allowing our engineers to work cleanly and efficiently. Support engineers can assist your lead engineer whenever needed, keeping quality high and timelines realistic.

  • • Large, modern 11,000 sq ft facility
    • Experienced team with dedicated engineers per project
    • Clean, organised bays with secure part storage
    • Transparent pricing and realistic timescales
    • Demo cars so you can hear results before you buy
    • Exceptional finish and attention to detail
    • Lifetime workmanship warranty
    • Photo/video documentation of your install

  • Yes, we can install your own equipment such as amplifiers, speakers or subwoofers. All parts need to be inspected at our site before we can confirm a quote. This ensures everything is safe, compatible and installed to our usual high standards.

Can’t find what you’re looking for?

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Let us help you find what you need.

Lifetime warranty

Your install is covered by a lifetime warranty on our craftsmanship

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Secure facility

Your car is secure in our 11,000 sq.ft. workshop

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Technology

3D printing, CNC machining and RTA tuning to create the best sound

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Hire cars

Keeping you mobile while your car has it’s spa treatment

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Family business

Our amazing team will make sure you’ll get the best experience

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Awesome coffee

We’ll make sure you enjoy the best coffee while we take care of your car

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“Just listening to this audio system in here sounds unreal. To have this upgrade is the ultimate. It’s perfect.”

— Shmee150