gswelch

Help! 2005 A4 Cabrio 3L. New to this forum and am having trouble with all my speakers going out occasionally with a "pop". Just driving along and pop they all go out at once. Can't seem to find much on the radio here. When it first happened they would come back on in 10 minutes or maybe 2 days with another pop. Checked under my back seat and did find a puddle of water... pulled the seat out... let it dry... found the leak and while the seat was out the speakers were fine. Put the dry seat back in yesterday (left it out for 10 days) and again POP... no speakers.
When the speakers are out - the radio in the dash is fine - stations are there, songs display etc. - just NO sounds. Checked the fuse... no problem there. Any clues??? Where is the amp etc in this car???
Thanks