Was there ever a factory option for upgraded speakers or sub? After the bose system I had in my a4 the octy just doesn't compare, but I don't want to fit a whopping great sub taking up all my boot space. Was or is there any upgrades out there that are factory fit focused? Or is there no other option than the big sub box in my boot?

Hmmm would be a rather expensive retro fit. I'll just have to start with better components and go from there.

Thanks for that Mike. Looks a scary job and far too much hassle for me.