I was told many years ago by a sound engineer that a stereo power amp, (P.A, or home hifi) must have speakers running from both sides at all times, otherwise they amp could blow. How true is this? I run a 2k Peavey P.A, consisting of a 2k stereo power amp, Hysis 2 tops and 15" bins. I did a very small gig last week. The Landlord told me artists often set up only 1 speaker. I politely declined and insisted I had to use 2, or risk damage to my gear. The issue has troubled me since. Was I wrongly informed all those years ago, since apparently, other artists at this same venue have used only 1 speaker? Clarification on this would not only satisfy my mind, but would also make checking my presets on my HD500 considerably easier, as I have been hauling my full P.A into my living room to check my patches.