Hi - System / Sony 735 / Marantz SR4200 / Kef Cresta 3's / Centre / 1's. The Front L&R are driven from a Naim 72 / 140 / Flatcap combo, which has greatly improved the dynamic range of the system and dropped the low end of the Kefs considerably. With the improvement to the Front, I'm wondering about doing the same with the Centre (probably leave the rear of the Marantz). I'm thinking of getting hold of an old 90/3 and using that to drive the centre, running straight off the pre-outs on the Marantz. As its a two channel amp and the Centre can be Bi-wired i'm thinking of using one channel to drive the bass and the other to drive the treble. Apart from making up a RCA / Din lead (got some old Chord leads to canibalise) can anyone see any problems / has any suggestions on the above. Intention is to eventually go Naim AV2 processor and Dynaudio speakers but enjoying the experimenting at the mo... Cheers James.