Ok, well I might be getting a job soon, so i can finally get a new amp setup! Well, right now my idea is buy a 4x10 cab (unsure which brand though) and run it through the PA until i can afford a head for it. But i told my guitarist the idea, and he said it would blow the cab. He said PAs run on instrument cables, not speaker cables. And since cabs run on speaker cables, not instrument cables, he said i would blow the cab. Is this true?