aight. i'm doing a song tomorrow in the SECC

tomorrow, and we have a HUGE stage. I can't get ahold of my friend's wireless kit, and hell, I don't even have a guitar lead atm!
I do, however, have a 20foot speaker cable. However... the buzzing is terrible. Can anyone explain this? I'm guessing the extra shielding is the culprit? why?! Why!!!
today we set up so that I was DI'd to the desk, but I was considering bring my trace head along with me... if that extra info is any use.
should I just take advantage of the 20feet? i refuse to be confined to such a small area of a huge stage!!!
