Originally Posted by cspirou
For an amp that has a lot of differential parts to it, why is having a balanced output not an option?
I believe dsavitsk will want to weigh in on this, but my perspective is as follows - I suspect that in solid-state, the primary benefit of having differential all the way to the headphone is from the increased voltage swing that's created (slew rate, too, admittedly). Solid-state doesn't have a lot of voltage to work from. Tube amps have plenty. It's kind of pointless to pursue increased voltage swing when you start from a B+ of 200V.
The other factor is in avoiding extreme cost. Differential inputs - especially a differential volume pot - then differential output connectors, not to mention four output transformers(!), are all very expensive. The result is very little to no additional common-mode distortion cancellation for a huge cost.
Edited by tomb - 10/12/15 at 6:53pm