I'm also curious if anyone has seen this mod someone posted elsewhere: (from http://www.headphiles.org/index.php?t=msg&th=12&goto=237866&) Has anyone else tried this?
"Well, the Q40's still alive and well. I decided to try a little mod tonight. See, the Q40's driver is surrounded by a foam ring that's glued to the driver:
On paper, it's supposed to increase bass response. This foam ring around the driver is covered by yet another layer of foam, instead of the thin cloth that other other headphones use.
Anyway, I decided to experiment and removed the foam ring entirely. I also removed the extra layer of foam, leaving me with exposed drivers protected by the metal cover in the cover. I decided to continue using the DT770 velour pads. The mod is non-reversible btw.
When I settled down to listen to them, I just went "OMG". I had a friend who was into headphones visiting, and both of us were shocked at how much the sound changed. The soundstage was so much wider, and the mids became more forward while the bass didn't seem to be affected much. The best part was it sounded like a veil was lifted from the headphone's stock sound. Everything was so much clearer. I'd describe it as an HD598 with better clarity in the mids and more bass, or an HD25-1 (copper cables) with much wider soundstage. The bass was still plenty responsive, and to make it sound to my liking I've been EQ'ing it down, around -3 on Rockbox. Right now I'm unsure of where to put it in my headphone hierarchy but it's definitely up there with my favorites. Before the mod, it was collecting dust
Edit: In order to clarify my point on how different they sound from stock, they sound great with rock music now Even better with 80s metal. I know it sounds hard to believe, so I'll just bring them to the next meet.
stefanolandesca had them for the past month or so. Much thanks for making them look presentable again "