Don't add me to the draw, I'm just posting out of a desire to share:
Do you have balanced headphones? If so, which ones?
LCD-2s at the moment, as they benefit from the wide soundstage possible with balanced gear.
For balanced headphone output, how important is it to have dual three-pin XLRs as well as a 4-pin XLR?
Dual three-pin outputs came from HeadRoom's original Blockhead which was two completely separate amps, with separate power sockets joined together in a single box. Since everyone now does this more conventionally, we only NEED one plug, so 4-pin XLR it is IMO. 2x 3-pin plugs is a nuisance to have to modify a pair of headphones for.
For a balanced amp, how important is it to also have single-ended outputs?
If single-ended is important, is the quality of the single-ended outputs as important as the balanced outputs, or is this more of a “utility” thing so you can use all kinds of different headphones?
If it is just a "utility" then it's pretty useless IMO if you can't get good quality out of it when, say, borrowing cans that you can't use as your other headphones. The SE amps I've really liked were all slightly coloured, whereas the balanced amp I own is absolutely, utterly "nothing but the facts maam" and the SE output of that amp isn't very exciting at all. Maybe it is that every amp has to make a point in some way with its affect on the sound and my balanced amp does that with its balanced outputs, only.
Do you have balanced headphones? If so, which ones?
LCD-2s at the moment, as they benefit from the wide soundstage possible with balanced gear.
For balanced headphone output, how important is it to have dual three-pin XLRs as well as a 4-pin XLR?
Dual three-pin outputs came from HeadRoom's original Blockhead which was two completely separate amps, with separate power sockets joined together in a single box. Since everyone now does this more conventionally, we only NEED one plug, so 4-pin XLR it is IMO. 2x 3-pin plugs is a nuisance to have to modify a pair of headphones for.
For a balanced amp, how important is it to also have single-ended outputs?
If single-ended is important, is the quality of the single-ended outputs as important as the balanced outputs, or is this more of a “utility” thing so you can use all kinds of different headphones?
If it is just a "utility" then it's pretty useless IMO if you can't get good quality out of it when, say, borrowing cans that you can't use as your other headphones. The SE amps I've really liked were all slightly coloured, whereas the balanced amp I own is absolutely, utterly "nothing but the facts maam" and the SE output of that amp isn't very exciting at all. Maybe it is that every amp has to make a point in some way with its affect on the sound and my balanced amp does that with its balanced outputs, only.