For more info here is the situation. I've got someone local offering an Ampeg SVT-6 Pro bass head for a stupid low price, they aren't a musician and have no music gear, and I don't have a speaker cabinet I can plug it into at the moment. I'd like to buy it, because who doesn't want a cheap SVT, but I want to test it somehow. Read the manual and don't see a headphone jack, nor any mention of them. I also know enough to know to NEVER plug headphones into the speaker output jack of a 1100 watt amp. Is there any safe quick way to test this thing without killing my ears, or phones?