Quote: Originally Posted by JaZZ /img/forum/go_quote.gif BTW, has anybody ever demonstrated without a doubt that different headphones sound different? . Umm.. yes? Different headphones measure radically differently frequency response wise, and it is rather unlikely people would fail to spot the up to 10 db differences in bass response. Unless the test did not include bass frequencies. Is there any reason to assume that large differences in frequency response in the 30-16KHz range would not be obvious to the large majority of humans? Or that frequency response graph differences don't translate to real audible differences?