Can someone briefly explain to me the difference in ohmic values and how they affect headphones? Thinking about buying some dt 770's, and trying to understand the difference between the 80 ohm vs 250 ohms. 

Anyone have any experience with Beyerdynamic's COPs and PC gaming? Looking to buy a pair, and wanted to see other people's experience with these headphones, and whether or not I should purchase these.

Hi. I'm new to the whole headphone scene, and am looking to purchase a pair of closed headphones. I was initially looking at the m50's, but someone recommended the beyerdynamic custom one pros to me. They're a bit pricey for me, but I'm ok with buying a used pair. Before buying anything though...