I bought these headphones used on eBay in November '07. They were cheap, and were drilled through the headband for a listening post. They came with brand new HD650 cables.   This review will not be 'editorial' quality, because I can't stand the pompous, flowery hifi-speak that most hifi journalists subscribe to. This is more about why I like my HD580s.   I bought them before I had an amp to run them with, and so built one. I'd been using AKG K141s for several months prior to buying these, and was fairly happy with them. However, as soon as I...