the Q's have "unoffending" "slightly to recessed" treble, if you like grados, ad700, hd25, hifiman re2's, monster turbine coppers, any etymotic for that matter, I wouldn't get the quads
the bass really was the best i have ever heard in an IEM, it had very deep extension and weight but to my ears, it was overbearing. the treble and non stop fit issues were unbearable for me as well as the closed in soundstage with instruments positioned slightly behind my ears. also, I'm not sure about this, but 1964 ears told me they couldn't change the sound signature at all while reading the unique melody site, they said they can change the frequency range a couple degrees so.. yeah not sure about that anymore but alas, the quads aren't in my possesion anymore