Spent some time earlier today A/B-ing the Luxman 505uxii and the Accuphase e480 at a friend's place.
I am a big fan of Accuphase. I prefer Accuphase to Pass Labs, Gryphon, most of Mcintosh, when driving most headphones, especially the TC, because the Accuphase has this midrange sweetness which is just the right amount, and a treble that is a nice balance between being energetic and polite. I have owned the e380 for a long time.
However, in this instance, I wanted to see what the Luxman amp could do with the TC. I used my FiiO M17 as a palette cleanser.
The M17 drives the TC well. But of course, not nearly to its fullest technical performance potential. Switching to the Luxman, the stage widened massively even off the humble Denafrips Aries II DAC. The Luxman slammed probably twice as hard as the M17, which you would expect (the M17 was also not in DC powered mode). Resolution improved perceptibly.
Switching to the e480, the TC stage widened even more. The images were massive and out of the head. Slammed as hard as the Luxman was probably slightly, ever-so-slightly more detailed. I didn't have my own e380 at hand, but would have loved to compare.
Overall, in terms of tonal and technical performance, I preferred the Accuphase and the Luxman to the M17, which is of course, no surprise.
But what was surprising to me is how well the TC tonality synergizes with the M17. I find the M17 thick and smooth sounding, which does not work for me with ZMF cans. But with the TC, damn, it's a really lovely sound, even if you sacrifice some technical performance.