i got some issues on mine, brand new cables...when it arrived with my V8 the right side is abit low gain when in terms to volume...
i emailed them then they asked if not a fit issue? then i said i dont think so...
so they send another cable...it solved it...i think the cable they are using aren't that high grade...
Most likely this. I know it isn't in everyone's budget, but a custom cable is a nice way to go. At least something with a little bit better build quality. I'm not talking anything crazy, like 90 bucks or so.