BMW Audio Upgrade
Check out our BMW Sound System Upgrade Packages below!
Take your BMW audio system to new heights.
Choose your setup and commence your journey into extraordinary sound.
Perfect for a clarity upgrade with an OEM look
£730
Duration of installation: 1 Day
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
Perfect option for those looking to do a bigger system in the future
£1,450
Duration of installation: 3 Days
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
Perfect for a volume, clarity and bass upgrade with an OEM look
£2,725
Duration of installation: 5 Days
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
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
Perfect for OEM look surround sound with a custom tuning session
£4,100
Duration of installation: 8 Days
Perfect surround sound system setup if you have Harmon Kardon
£4,795
Duration of installation: 9 Days
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
Perfect for a complete custom surround sound upgrade with a bespoke tuning session
£7,200
Duration of installation: 17 Days
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
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
Perfect for those who have a relentless pursuit of excellence.
£11,900
Duration of installation: 30 Days
Ideal for perfectionists who won't compromise on quality.
£18,950
Duration of installation: 33 Days
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
Designed for those with an unwavering commitment to excellence.
£46,300
Duration of installation: 40 Days
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
Ideal for individuals who refuse to accept anything less than perfection.
£124,178
Duration of installation: 60 Days
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.
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.
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.
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.
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.
Trusted by celebrities
Frequently asked questions
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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We follow a clear, structured process so the system sounds amazing in your exact car and for your taste in music.
Measure the factory system — we analyse your OEM setup with calibrated microphones and REW (Room EQ Wizard).
Configure the new system — we set gains, crossovers and polarity so everything performs correctly.
Precision DSP tuning — we bring the REW data into our DSP software, time-align each speaker and apply EQ for a balanced sound.
Tune to your music — using your favourite tracks, we fine-tune by ear for tone, staging and detail.
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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.
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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.
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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.
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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.
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• 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?
Let us help you find what you need.
Lifetime warranty
Your install is covered by a lifetime warranty on our craftsmanship
Secure facility
Your car is secure in our 11,000 sq.ft. workshop
Technology
3D printing, CNC machining and RTA tuning to create the best sound
Hire cars
Keeping you mobile while your car has it’s spa treatment
Family business
Our amazing team will make sure you’ll get the best experience
Awesome coffee
We’ll make sure you enjoy the best coffee while we take care of your car