I sort of impulse- bought these since I got them for only about $90. At first I didn't care for them, and even after near 100 hours of burn in, treble seemed to not just roll off, but drop off, just no extension. Also, I am sourcing them solely off of my iphone 5, so it isn't quite fair for a set near 40 ohms impedance. With that said, I removed the little wax guard filter in the nozzle ( because I have good hygiene, and I never get wax in my buds.) man, those things were filtering out some of the treble! Now, at high volumes, these things can even sound bright! Note that I am using the silicone tips. The foam filled ones didn't work for me, and comply tips didn't help sound quality in this instance. So yeah, I'd like to contribute that thought to you other owners. Cymbals have a very pristine yet contained shimmer, especially in the intro to Metallica's "hell and back". Snare drums are also very sharp, vocals sound more natural, and less like the singer is covered in a blanket. Guitars sound kick ass now, especially the throaghty guitars used in metal music. Damn, do they sing. You can also hear these In Linkin Park's hunting party album, as they use guitars used for metal music. These sound so good with that album, especially because the recording has outstanding quality.