Audi A4 Cabriolet 2004 - 7 - Front Midrange Speakers; 8 - Rear Bass Speakers; 9 - Rear Midrange Speakers; 10 - Bass Loudspeaker

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7 - Front Midrange Speakers
In upper front door trim
8 - Rear Bass Speakers
In lower rear door trim
9 - Rear Midrange Speakers
In upper rear door trim
10 - Bass Loudspeaker
Below rear shelf
11 - Center Mid/High Range Loudspeaker
In instrument panel
12 - CD Changer Unit -R41-
Optional
In glove compartment
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication