I dont see myself buying a HE90 ever (even if bill gates donated 1 billion to me) mostly due to the fact that its 1 HP with no warranty and no way to fix it if it breaks.
I dont consider the cheaper stax or the 009 for now at all (two things have to happend before that. Have the money, audition them, so earliest that its possible is september).
I still have to hear the HD800 as well, so I have a long road before I decide on what HP ill buy. One thing is for certain, im not dropping any kilo buck until I hear the damn thing :D.
Also note that diminishing returns hit so hard at this level that I might just get a 207 with a better amp and mod them (I read somewhere that 207, 307, 407 and 507 uses the same driver, just the enclosing and pads vary).
If thats is the case... anyway, its been around 3 years sicne I bought my HE-400, so it might be time to look for something better/different.
I believe Sennheiser provides service and parts for all HE 90s. (Not for free, of course.)
That's understandable. Don't want to risk so much money when you haven't even heard the thing. (Though I'm hardcore, so I just buy stuff before hearing it. lol)
I hope this whole diminishing returns thing is overblown. I was disappointed with many of the more expensive headphones I've heard and was hoping that the best four figure ones would be on a much higher level of sound quality.
Yes, they all use the same driver. The cables have different resistance and capacitance. Some of them have the same pads and enclosure as well. All I know for sure is that the 507 has genuine leather pads and a metal enclosure, unlike the cheaper ones.