Complete ignorance here. I'll soon own a second amp and am thinking what to do with my original cheapo......mothball it, sell it, or? Does an ABY switch allow a guitarist to switch between amps via a foot switch? Will this same ABY switch allow for feeding both amps simultaneously providing a stereo effect? Does feeding (splitting) one's guitar signal into two different amps simultaneously affect the power and tone shaping aspects at each amp? Or is one better off using an ABY switch primarily to access each amp independently?