So it turns out its a pretty easy fix. If one of your earphones is a bit quieter than the other, it could be because you have got wax in the "grill" or "net" or whatever the technical term is, but basically I just took it off CAREFULLY as I didn't want to pierce is using a safety pin, and then just rinsed it under a tap for a few minutes, chucked it back on the earphone, left it to dry and wollah! I now have two evenly sounding earphones
might try it with the right one to just give it a clean