I've been listening to a new pair with the velour pads out of a MacBook Pro -> D2 Boa for ~100 hours. The bass is certainly adequate for me. I do find the noise created by the auto-adjusting size mechanism a bit irritating. It will stop once the phones are perfectly positioned my head...

Yes. Like many people, I love the sound of the open phones (HD595 and SR225i), but when at work they can disturb others or allow unwanted environmental noise to interfere with listening, so I use the closed K271. In my case it's not so much the disturbance of coworkers, but I sit next to a large...

Heh, gotta give Aynjell a little credit. 95% Peete, 5% Aynjell. Thanks again sir.

Well, you guys were right. The connection between PCB ground wire and pot was loose. I did inspect it before but not closely enough (i.e. touch it!). Had my dad solder it and the hum and pot noise are gone. Thank you very much, gentlemen, and sorry to waste your time.

Just bought a second hand Zero (upgraded version with OPA627, LT1364, pot) and notice a faint humming in headphones when connected to the headamp output. When I touch the chassis with my hand, the volume of the humming increases significantly. There is also an inconsistent crackle-like noise...