Oh wow, a really good open-back from Pioneer. I had to hear it. It shines best with a desktop amp.
The cable is too damn long, sheesh. I might shorten it later.
I also dampened the backside of the baffles and the driver with Dynamat Xtreme for less midtreble harshness and a tighter, cleaner sound with improved imaging. Edit: someone else here did as well but added less and in a slightly different manner
I love the comfort, too.
I don't find it similar enough to HD650 in character to call it a $49 650. I think the sound resembles a Philips headphone I once tried, but better and more open.
Bass and soundstaging should improve some more by stiffening the pleather inner side of the earpads, but doing that with plasti-dip is such a time-consuming hassle (add a coat, let sit for an hour, add another, let sit for an hour - repeat until six coats). I've got some 3M 1080 matte vinyl car tape, but it is too soft to use to stiffen the inner side.
Anyone tried similarly-proportioned velours in place of the stock cloth pads? Beyer velours are too small and my K601's velours would require double-sided tape to stay, plus they are too deep and boost the bass along with the upper mids and lower treble (~4kHz-7kHz).
Edited by Mad Max - 6/1/14 at 9:32pm