You could put the rear speakers into the plate which separates your trunk from the passenger's room. (Ablage - alles klar? ;-) But you would have to cut holes into it - and not everybody wants to do that.

But the rear speakers aren't that important. In car-audio shops everyone will tell you that they are just for rear fill and don't need to be that powerful.

TeeMcBee
Got my Mk2! # 080000143