cfox10 10+ year member
Rock the house.
iirc they test to 10% thd on those? Don't quote me on thatI have an r500x1D and I'm only able to cleanly get about 450w rms anything above that it's fuzzy. Would a higher battery voltage or agm battery solve the fuzziness? I got a certificate that says 634w rms tested/certified.
Anyway, what is your voltage at? Feeding it more voltage will increase output as long as you can maintain the voltage. You also have to remember you will have impedence rise and many other factors working against you, they tested it on a bench.