As an upgrade for the active speaker system (standard in the Netherlands | an option in Germany), it was possible to upgrade to a BOSE Sound system.

The BOSE sound system can be recognised by the BOSE logo in the grilles of the door speakers. Over the years, several generations of the BOSE sound system can be found in the TT. With specific set-up and adaptation for the Coupé and Roadster. Below is an overview of the set-up and evolution for each type of Audi TT 8N.

BOSE sound system Coupé set-up

The first set-up of the BOSE system for the Coupé consisted of:

• Radio chorus (with casette) or concert (with CD player)
• Amplifier 4-channel 125 W with integrated equaliser
• Front door speakers
  6,5" Woofers
  2" Tweeters
  
• Dashboard speaker
  2" Centerfill
  
• Rear speakers
  6,5" Woofers
• Telephone input on amplifier

© Photo: Audi AG

BOSE sound system Roadster set-up

© Photo: Audi AG

The first set-up of the BOSE system for the Roadster consisted of:

• Radio chorus (with cassette) or concert (with CD player)
• Amplifier 5-channel 180 W with integrated equaliser
• Front door speakers
  6,5" Woofers
  2" Tweeters
• Dashboard speaker
  2" Centerfill
• Rear speakers
  3,5”woofers
  9" Subwoofer center
• Telephone input on amplifier

Later generations of BOSE sound system
From July 2001 (2002 model year) with the arrival of the chorus II and concert II, the telephone input moved from the amplifier to the radio. In September 2002, the BOSE sound system was fitted with an additional microphone in the interior for dynamic driving noise compensation. These BOSE sound systems feature a new type of amplifier recognisable by the silver colour instead of matte black and a new plug (see example of Roadster version).

© photo: unknown

As of model year 2004, specifically for the Roadster there is also the signal from the convertible roof added to the dynamic driving sound compensation, Depending on open or closed driving, the equaliser in the BOSE amplifier adjusts the sound.

© Header photo: own