Audi Car Audio Upgrades UK

How to upgrade Audi car audio in 2026

Audi cabins are quiet, well damped and built around tightly integrated infotainment, so the upgrade path is different from a Ford Fiesta or Vauxhall Corsa. You usually need to keep the factory screen, retain MMI controls and work around the optical fibre Bose or Bang and Olufsen systems on higher trims. This guide explains exactly which Audi platforms accept which upgrades and which kit you should pair with each car.

Working with the factory MMI screen

From the early B7 A4 through to current B9 and later platforms, Audi uses a dashboard mounted MMI screen that is not designed to be replaced. You have two routes. Either keep the MMI screen and add a high level audio interface that injects new sources, or fit a CarPlay and Android Auto add on module behind the dash that feeds video into the existing display. Both approaches retain the standard Audi look without cutting trim.

Speakers, mids and tweeters

Almost every Audi from A1 to Q7 uses front door speakers in the 165mm range with dedicated A pillar tweeters. Direct fit component sets from the right brand transform clarity without any cutting. Strong choices we stock for Audi platforms include the following.

• Hertz Mille Pro. Detailed mids and silk tweeters that suit the Audi tonal balance.
• Focal Performance. Open, dynamic sound with strong stage height from the A pillar.
• Audison Prima. Engineered to match Audison amps and digital processors cleanly.
• JL Audio C2 and C5. Warm, neutral character that pairs well with stock Audi head units.

Subwoofers for Audi boots and underseat fitment

If you have a saloon like the A4 or A6, a sealed 10 inch enclosure tucks neatly behind the rear seat without losing boot space. For Avant estates and Q3, Q5 or Q7 SUVs we recommend an active underseat subwoofer or a slim spare wheel well enclosure so the load area stays usable. We stock options from JL Audio, Vibe, Phoenix Gold and Hertz.

Brand quality at a glance

• Audison. The premium choice for Audi, engineered around quiet European cabins.
• Hertz. Italian engineered. Direct sister brand to Audison and ideal for OE style upgrades.
• Focal. French detail and air. Strong tweeters that lift the Audi stage forward.
• JL Audio. American precision and proven amplifiers for clean install power.
• Vibe. UK challenger brand offering sharp value across speakers, subs and amps.

Compatibility and fitting

• Fascia adapter. Required if you do replace the head unit on early A3 or A4 platforms.
• ISO wiring harness. Plug and play loom so you never cut Audi factory wires.
• Steering wheel control adapter. Keeps your wheel mounted volume and skip working.
• MOST fibre optic interface. Essential on Bose and Bang and Olufsen equipped cars.
• Aerial adapter. Required for many Fakra style Audi antenna sockets.

Picking the right amplifier for Audi

Audi cabins are quiet, which means a clean Class AB or efficient Class D amp pays back instantly. For most builds, a four channel 75 to 100 watts RMS per channel amp drives the front components and powers a single 10 inch sub from the bridged pair. Compact under seat or boot mounted amps from Audison, JL Audio and Phoenix Gold are our most popular Audi specifications.

Sound deadening for Audi doors

Audi doors are heavy and reasonably well sealed from the factory, but they still benefit from a sheet of butyl rubber on the inner skin and closed cell foam around the speaker ring. This kills door panel rattle, tightens up bass response and lifts perceived volume without you turning the dial up. Silent Coat, Dynamat and STP kits are our go to.

Why buy from Bass Junkies

We have been fitting Audi car audio in Wolverhampton since 1995. Every order ships with full UK manufacturer warranty, free standard delivery and 14 day returns. Call 01902 863 005 if you want a recommendation before ordering and we will match the right interface, fascia kit and amplifier to your exact Audi model and trim.