#8 Very little blind listening tests.
I made many simple blind tests in my few years of mechanical, electrical and acoustical incremental process of optimization for my system ...
Then you means by blind test : double blind test protocol ... guess why it is generally useless for me and any other audiophile optimizing his system ?😁
Only objectivist fanatic promote double blind test as the only "proof" of a small change ...
For small change i dont need public validated proof because all ears, all designs and all gear pieces and all acoustic rooms or all headphones etc are not equals ...
For big change i dont need double blind test public validated proof either ... A company may need it to sell it , not me designing my own system with gear pieces i use my ears.. ...