I am well aware of the ill effects of op-amp output stages. The problem is that so many players--even multi-thousand dollar units--have op-amp output stages or op-amps elsewhere in the design. Indeed, a discrete output stage will always sound better. Though, this HDAM thing in the Marantz units is pretty good. Some say its an op-amp, others say it is not. I have yet to figure out what, exactly, it is. In any case, is sounds better than whatever "OPA" three or four digit number (i.e. 627, 2132, 2134, and on and on) is offered by Burr Brown and the like.
A discrete output stage requires real design skills, and an op-amp is an inexpensive shortcut. This trend shows not the slightest sign of being reversed.
A discrete output stage requires real design skills, and an op-amp is an inexpensive shortcut. This trend shows not the slightest sign of being reversed.