Either the QA control is bad for sennheiser and they're sending out two different versions of these, or some of you are terrible at describing a comparison. There is no way you can hear the hd660s as "brighter" than hd600 or hd650. The hd660s sound almost as veiled as hd599, as if there is a...

Mine definitely don't have more high freqs than hd650, I mean it's obvious to anyone putting these on right away. The difference is huge, which is what makes what people write here, and say in reviews make no sense to me.. I will be swapping them next week but just wanted to know if others here...

Are my pair of hd660s possibly faulty? They do not sound at all what everyone is describing them as, but even more veiled than even hd599. Going from hd599 and hd650 I expected something with higher freqs. It sounds like there is a low pass filter stuck on mine. They also don't seem to handle...