This discussion seems misguided. Reading the mod page, it sounds like it's about removing/adding some foam behind the driver (which is the identical between mo

This discussion seems misguided. Reading the mod page, it sounds like it's about removing/adding some foam behind the driver (which is the identical between models) to alter the high-frequency response. Unclear if it increases or decreases the high end signal -- but ultimately whether you like the sound one way or another is a matter of taste. Personally, I find most headphones way too bright, but YMMV. I have a pair of Sennheiser 480s that i've owned and used regularly since 1989. I've replaced every part except the drivers at least once. For me, paying more money for the 595s for a beefier headband and higher quality materials would make sense because these are a long-term investment. Or at least the 480s were then. Not sure what the build quality is like now. The idea that they're "crippling" one vs the other like a piece of computer hardware seems to miss the point.