Picked up a Senheiser PC-350 SE recently and was blown away by the ridiculously bad sound quality. Huge peaks around 500hz/2khz that made listening to them unbearable. It was like someone took a crappy AM radio and held it up to one of those megaphones they use to yell at hostage situations. Obviously they're new and need to be broken in, but I seriously don't think that will fix these guys. They have some major resonant nodes - to the point of actual ringing. Did I get a bad set?
In any case, I've gotten them to be at least listenable with Equalizer APO and the following config (derived from REQ and my DBX RTA-M to find the most egregious peaks) :
[edits : manual tweaking these]
Edited by Weckso - 2/22/14 at 1:46am