the HD650's are one-note-ish? i don't think so. they have a pretty flat bass response. plenty of upper mid-bass and plenty of deep bass. they definitely cover the whole bottom end. i'm confident that more people are happy with the bass than not happy with the bass. these kind of comments are why i am starting to hate this place. so much negativity and subjectiveness. maybe the amp or source you were using was one-note-ish. the HD650 is well within the +/-3db spec starting at 20hz all the way up into the mid-range.
The JVC FX500 / FX700 earphones ;)
But tbh, the bass quality I feel of the DT880 is much better. It isn't one-note-ish like the HD650 / HD600. Not the only one that feels this way.
Bass isn't all about just quantity people. the bass guitar does play more than one note people.
Edited by jasonb - 12/21/10 at 7:57pm