How about 'they think they hear it work'? Whether this device does anything at all has not been proven to my satisfaction yet - remember some audiophiles claim to hear the effects of some pebbles in a jam jar...  I have that one filed under religion rather than audio science. I'm not saying the Phonosophie device doesn't work, nor am I implying that Zanash etc are liars or charlatans - I'd just like more evidence before forming an opinion.

Tony.