Mine was the Koss Portapro.

.....but I'm keeping myself from opening it till Christmas. It's almost impossible.     What can I expect from the sound quality? I hear it has a flat response, but i've heard others say it's bassy...   it probably depends on what the person is used to listening to, right?

I'm a total newbie to this.   Can someone describe how headphone amps improve the sound? The only thing I know about it is that it "tightens" the bass.     thanks in advance!

I recently ordered a pair of the Audio Technica ATH-M50 headphones. They haven't arrived yet.     The seller is "PHOTOTECH", and as the name suggests, they mainly sell photography equipment. However, they do have the M50 and M50S headphones for sale as well.    ...