Stuff like this really concerns me.... I have this Pyle marine amplifier lying around that's 4"x3" and claims 100x2 RMS at 4ohms. I know it's a piece of crap amp which is why it's been sitting in my toolbox unused for a year but claims like this are just crazy. I'm planning either Kenwood or JL to go into the boat so at least I'll feel somewhat confident in the numbers.