Sorry to say, but both legacy and sony make shitty amps. The good amps out there are: Cadence, JL, Phoenix Gold, Precision Power, Alpine, and a few others. They are companies you can trust. Unlike home audio, car ausio amps don;t have to follow a certain guidline. They can say just about whatever they want to about their amps and how much power they put out, it is not regulated. In home audio, they have to say HOW they got to that specific power output, how many volts they gave it, what conditions did they test it in, at what S/N ratio, what % THD, and other factors. COmpanies like sony, and legacy just gove their amps the perfect conditions and allow 10% distortion, and lowered S/N ratios to "say" that their amps can produce that much power. ALl you are buying when you buy their amps are empty hallow watts.