No, definately just 2-channel operation, I don't really bother with DVD-Video that much, and DVD-A hasn't kicked off in the UK yet.

I'll have to talk to my dealer (Music Matters in Solihull) about Bi-Amping with a 556 - I've heard that it can be done, but I don't see how it'll work 'cause the 556 is rated significantly more powerful than the 551... maybe you can adjust the gain in the 556, or the pre-out gain in the 551???

Cheers,

David

596, 551 (pre-amp), 557,
Martin Logan Clarity, Rega P25, Lehmann 'Black Cube'