I am a complete newb when it comes to repairing audio equipment. I have a pair of these: And I need to replace the plug. Not the big optional one that screws on top, but the one that is part of the wire. 1. What part is that, exactly? I think it's called a "mini stereo plug", but are there different versions? 2. Can I replace it myself, or should I get it replaced an in audio store for $25? I'm pretty sure the plug is the problem as i've plugged it into 2 computers and I only get sound on one side unless I twist the plug around a bit, then I can get both headphones until I let off the pressure.