[illingworth22]

I am looking at buying a Blaupunkt Amp for the e92 Coupe. Now there are two I am looking at the 475 (4 channel) and the 575 (5 channel)
So here are the Q's
1) Is it worth the extra few quid for the addition of the 5th channel? I would assume you would then have Front, Rear and Subs?
2) Would the 4 channel be sufficient and if so what set up would you recommenced (Front channel for front speakers rear channel for the Subs and leave the rear speakers driven only by the head unit - or - Front channel for front & subs and the rear channel driving the rear speakers).
3) Are the outputs on the 475 adjustable?

I am a HI Fi Novice so I hope the above questions make sense