which is the bose system?<br>Concert or Delta?

diffs are:<br>concert in post 98.5 A4s<br>delta in pre 98.5 A4s<p>both have options for bose system.<p>concert takes panasonic CD<br>delta takes alpine CD

The bose system consist of speakers and amplifiers, not the head unit (radio). I was/is an option with both style of radios.<br>The Delta radio came in older A4's. The newer Concert radio is the current offering on the A4. This change was done in the early 98 model year. This is one of the distinctions that have people signing off with 98 or 98.5. There is a FAQ of the rest of the changes if you're interested.<p>HTH<br>Bert