They suppress the fan noise mostly in the middle ranges, leaving a higher frequency hiss

I own a pair of Fidelio X2s, but I needed a pair of closed cans to block out fan noise in the dorm

makes my typing tinny which is annoying when used without music, but reduces ambient commute noise and office noise without whining/humming – including fan noise – rumbles canceling train noise (still better than with it off)Cons:- Uncomfortable for long wear (YMMV

The fan noise does not magically vanish, but is suppressed and becomes less dominant

Also, I used these headphones in an environment with lots of fan noise in the background, and the fans drowned out most of the MSR7's low end

The earpads are nice and plush as they should be, plenty big for my ears, but aren't huge or overly soft

Recommended A+++

The mids are really good though, as well as the highs

I can tell that these are very much meant for the casual listener, as they did not benefit from an amp from what I could tell

The new Momentum's (especially wireless) are about as close to perfect as you can get for a portable consumer headphone

I have a pair of M50x's as well as with several other pairs of headphones, but these are by far my favorite set now

the next step up was their ESP "phones"Koss ESP-950 Electrostatic Stereophone but at about a grand each and the lack of portability, for those reasons they weren't even a consideration

I like the A

My husband has a B&O pair made like these that swivel and they’ve lasted for some time

It’s also great for listening to audio books as I work outdoors.