Meridian 861: can have balanced outputs on some or all channels
Theta Casablanca (I or II): can have balanced outputs on some or all channels
Meridian 568: balanced outputs for front left, right, & center only
Theta Casanova: balanced outputs for front left, right, & center only
EAD Theatermaster (Excluding the Encore): balanced connections for front left and right, but only operate in a true balanced mode during two channel operation (the rear DACs are applied to provide two DACs each for left and right).
Proceed AVP: if memory serves balanced outputs up front, but I don't recall whether that includes the center channel or not.
Of these, I think only the Meridian 861, Meridian 568, and Theta Casablanca II will do 7.1
[This message has been edited by Will Binegar (edited 02-08-2001).]