Valve amps might sound “nice” but that’s just playing tricks with the human audio anatomy. There is no concept of “sound reproduction accuracy”. You get loads of nice smooth 2nd harmonic, but you could build a solid state amp which emulates that. It’s already been done – digitally (DSP) AFAIK 
You get loads of nice smooth 2nd harmonic
Not on mine you don’t – they’re balanced so 2h cancels.There’s some 3h at low levels. What there ISN’T is high order harmonics, nor intermodulation. Personally I think THD is pretty useless as a measure of anything. As you say we can handle any amount of 2h, in fact our outer ears produce it (no idea how, but apparently they do). Whereas high order and especially intermodulation sounds awful. To the extent that magic cables etc do anything at all, it’s probably by avoiding pumping external interference into the NFB loop of typical heavy feedback transistor amps.
When I was auditioning amps for London, I tried a zero feedback transistor amp – expensive. It sounded truly appalling.
All snake oil I have been designing and building this stuff for decades. But one can’t argue with imagination, placebo, etc. Zero feedback is also complete nonsense.
The amount of stuff you need to watch for and monitor these days while automation is running…
… funny, but not…
Headlines in the UK today ….
Gosh this is Grade A serious stuff. Much more important than the war in Ukraine, so instead of googling on 155mm ammunition compatibility I did a google on “angela rayner legs” and found that even the bastion of British civil liberties is carrying the story
Of course the French are ahead in this area.
Should you fail the Isihara test you now know why:
Pretty sure that happened ages ago, no??
