How to... upgrade your car's stereo - Bose in Audi Q7

Audi Q7 £26,225

UPGRADE Bose Surround Sound
COST £1800
PCP COST £51 per month

Even the standard-fit hi-fi in Audi's Q7 provides eight speakers, coupled to a single-disc radio/CD head unit. Every speaker is of a good size, too, meaning that even in the Q7's cavernous interior you can generate a powerful, bass-heavy sound. Musically, the system has pace and accuracy, too.

However, should you demand more, you can upgrade to Bose Surround Sound. This has 14 speakers, coupled to a dedicated bass-generating subwoofer. A digital surround-sound processor allows you to generate various sound effects from stereo CDs, while a six-disc CD changer is available as a £320 upgrade.

It's an excellent system, providing an exhilarating blend of power and dynamic ability, while voices benefit from terrific clarity.

Drawbacks? It's a stipulation of the Q7's options list that the Bose system can only be specified in conjunction with Audi's MMI High multi-control system. This adds considerably to the cost: the Bose system is £575 in isolation, but since MMI High costs £925 for all trim, the total bill (including the CD changer) is a substantial £1800.

We'd argue that if the Bose system was available in isolation for £575, it would be more appealing.
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