Ok, so for the past few years I've been really wanting to get a Power Mac G4 just to really pay with and what not. I've decided that I should focus on other priorities in life but, right before that, I purchased a set of Apple Pro Speakers on eBay. They're claimed to be brand new and still has the covers on the speakers. I'd like to sell them but I want to make sure they work before doing so. I realize they'll only work with certain PPCs but is there any way of just making sure they'll work?