So I've scoured through all the forum posts possible for mods on my ATH M50, and looked at/considered all the options for mods. I removed the damping material behind the driver first, and decided that I liked that change, so I looked for further improvements. I ordered the DT250 pads, and about an hour ago I just painstakingly worked them on, and gave them a shot.
Super comfy. Totally worth it in terms of ear heat and comfort, if that's all you want.
It's just straight-up bad to a trained ear imo. The bass becomes overwhelming and boomy, the mids lose a lot of detail, but the highs seemed relatively untouched. It sounds even more heavily mid-scooped than the ATH-M50's already are. Seriously. That bass man, that bass. It's freaking nuts how boomy and bassy the 'phones get from this pad change.
All-in-all, I'm going to look at returning the pads because when I put the pleather back on I had a "ahhhh, that's much better" moment. I was trying to convince myself in my head that my purchase was worth it and I was trying to hear good changes, but I just knew it sounded congested and bloated and had to give it up. I hope I can help anyone who's on the fence about this.
EDIT: Oh, and feel free to weigh in with your opinions of ATH-M50 mod combos if you have any personal experience.
Edited by mrickar5 - 3/12/13 at 3:20pm