La Figaro 339i Tube Headphone Amplifier

I just realised that the headphone out doubles as SE (single end) and XLR plugs. Is this amp optimised for XLR connection, or am I okay to stick with SE plug? Would prefer to stay with SE, but if there are gains with XLR with this amp, I am willing to invest in XLR cables for my HD580 Jubilee and HD650 headphones.

I see, thanks for your answer ;)

Apologies I don't monitor this, so stumbled across it much later. It's been so long I can't remember exactly what I grabbed for tubing, I'd been reading through some forums to find ideas on what would be good. For the v1 slots I'm using a pair of matched RCA 5693 Special Red tubes, for v2 it looks like some form of matched 6AS7G tube, labeled RCA 7304 on both tubes. Very warm sound overall, smooths out biting sibilance really well while still being clear and powerful in other areas. Tubes are all a little different though, and it's going to depend a lot on your chain, so I hope you found something that fits with your setup :)