Seen a post about this on TOTALMINI and thought I would give this a shot. Basically as we all know the R56 stereo is pretty poor and can't really punch any bass out.

This mod reverses the front and rear speakers so the bass signal goes to the back speakers as it should have in the first place!

The result - the larger rear speakers now handle the bass instead of the fronts. System sounds much crisper now and finally has some depth to it.

Takes about 45mins to do but totally worth it... best of all its free!