Hi everyone I just got the Massdrop O2s for my HE4xx from eBay. There's nothing on the amp itself that suggests if it's the Standard Gain (2.5x Low, 6.5x High) or Medium Gain (1.0x Low, 3.3x High) version. Is there a way to know that from the Amp itself? Also is the medium gain version (1.0x...

That is a really really good price for Momentums. For those cans, I'm more than okay with the price. I'll research the other suggestions and unless something better comes along, I think I'll just go with those.    Thanks a lot.  

Hello,    I'm looking for portable (good looking, if possible) headphones with warm sound signature that I can use while commuting or on flights. I should also mention that I won't be using any kind of amp and would just be using it with my iphone.    I currently own ATH m50x and...