This has come up in a couple of threads now (maybe more) so I thought I'd give it it's own thread. Some posters are finding their 650s over-bright and harsh, to the point of giving up on them. Here's a typical post from a recent thread:
"I think I'm done with my HD650's. Over a month now, I've been admiring their wonderfully lush midrange and tonality... as well as dreading that shrill treble spike thing I keep hearing and can't get rid of. There's definitely either something fundamentally wrong with the treble or it's very incompatible with my ears."
If this were an isolated complaint it wouldn't be worth examining, but a number of people are chiming in to agree. So what's happening? For years the main complaint about the 650 has been that its treble is not incisive enough. Now suddenly, to some ears, it seems to be coming over all K702/DT880/HD800. Has Sennheiser done something recently to these phones, or is it the equipment these posters are using? We all know the 650 got a little brighter in 2007, or supposedly so, but no one to my knowledge has suggested it was TOO bright. As a 650 owner myself I can't explain what these posters are hearing, but I don't for a moment suggest their opinions are invalid. And since the 650 is such a popular, iconic phone it seems important to get a general consensus on the issue.
Maybe anyone replying should state how old his phone is--certainly if it's pre-2007. Also associated equipment.