I greatly enjoy my ER-6i etys, but I've recently noticed a problem, which I can hear only in acoustic music, expecially solo piano. In the left earphone I hear a buzzing sound as if something loose was resonating a certain frequency; the noise is heard more when the volume is high (but not...

Hello, I own a nokia 6630 (great phone), and tried to use it as a portable audio source; then, i bought a cheap no-brand adapter similar to the nokia AD-15 (but without the unconvenient box): the sound quality in my (not amped) headphones is horrible; i'm no audiophile but I'd say it is very...