What?!? Why not just get a tube headphone amp? Or get one of those rinky-dink "tube buffers" if you think having a tube in the signal path will do something magical.
Vacuum tube amplified headphones...
....is an item that personally I've no real interest in, nor am I in any way linked to or have any potential to make any financial gain upon....nor do I know any of those involved with them....
But, in the interest of those would might find such an item of interest:
When a pair hits your pate, let me know if it's a hit *ow*...or a miss *(f/m voice) "What?..."*
I get notifications on K/S projects, and this is the 1st one I've seen of this nature.
If I see anything of an 'phile nature, I'll post it 'for your consideration'...just because. ;)
Have a great weekend, J