Lets suppose, you arrive at a Gig. They promised you two separate AC Circuits but there is only one available. There are other vendors who are also using AC, Caterer Photobooth etc. To make matters worse the Voltmeter shows that you are getting less than 100V. and you have not even started playing as yet. Eliminating the subs and amp to run full range is not an option because the mains just won't cut it by themselves in full range. What would you do? BTW you are about 50 miles away from home and it is Sunday afternoon and everything is closed for Rental of Generator. What would you do?