Anyone know anything about these little four channels? I bought this amp at a yard sale this weekend for 5 bucks. Powers up and seems fine but I can't find any info on the web about it at all. Does anyone have any experience with these at all. I was hoping to use it to power a set of 4" components in my front doors when bridged to two channels but I would like to know what the wattage and such is. Thanks in advance guys.