T1-AD1 Pioneer Car Stereo Steering Wheel & BOSE Amp Interface Fits Audi A6 99 On
T1 Audio latest 2014 SWC with MPB & BOSE Amplifed Interface Features. PIONEER Audi A3 A4 A6 TT 1999 On Car Steering Wheel & BOSE Amplified Interface Kit. Most Audi's with the Bose badge have either rear or all speakers amplifed.