Thanks Presata!

Am I wrong in thinking that this is not a headphone USB amp/dac, but just a USB dac?

Due to my dwindling funds over the years, I could not afford to fix my headphones and amp which slowly stopped working over time. I eventually threw them all in a cupboard and forgot about them.   I recently pulled them out and want to start enjoying them again. I have found the problems and...

Thanks for the tips. The 580 pics do show where the connector meets the cable and the spring system. That is the exact area which I need to get to on my 650's. It looks a little scary though, I am really worried about damaging them! I would love to see some pics like the ones Ham Sandwich posted...

It looks like one of the tiny connector contacts (female) have pushed through inside on the right speaker. It's where the 2 gold plated pins from the headphone cable fit into. I don't know how to get into the unit to see if it can be fixed. It has been giving me some trouble for a while now, but...

I have both these headphones. I listen to them through my PC's Audigy 2 sound card. The 580's cable has died, but it works with the 650's cable. I am interested in a headphone amp and source to get more from these. Is it worth the investment?