This has a lot to do with expectation bias ("I paid $200 more, so it MUST be better than your cr***y headphone), illogical comparisons ($500 vs. $50 headphone) and many new members with an enormous lack of experience, but with a lot of words to say.
Sennheiser are a big company that produce A LOT of headphones to fit practically every price bracket - a lot are made seemingly to simply fit into a hole in the market.
This is where comparisons are made, and suddenly something becomes a lemon because it's $30 'over-priced'.
Also a lot of reviews are based on OPINION and TASTE - some people here like to state opinions as fact - this can create a lot of confusion for new readers.
A big problem on headfi is that you don't know where ANYONE is coming from, what's their history, experience, professionally and personally.
Some people here just have more money than sense, some are poor and frugal, some are sound engineers, some are professional musicians and some are just kids that want BASSSSS!!!!!!!
Then take into account that personal taste is important - then add to that the shape and size of your ears can greatly effect the sound (especially on-ear headphones as the seal changes with ear shape/size which affects sound).
These are all factors we must review when trying to understand why someone CAN love a $50 headphone and another will state plainly that it's the worst they've heard in their life and is unbearable to wear - there are a lot of glasses wearers that are on a perpetual quest for comfort.
But this goes for all headphones ever.... not just Sennheiser.
Edited by GREQ - 3/28/13 at 2:07pm