They rate their amps at 14.4V, but that is plainly stated on the spec sheet. They honestly rate the output of the amp rather than plainly under or overstate it. If that makes them crap...everyone has their own opinion. If somone is getting all hung up over a matter of less than 100W when you are in the 1500W range in a budget level amp they need to get a life. The difference in volume of 100W, that you will never see anyway playing music, when you are talking about 1.5kW is nowhere near audible and hardly a reason to talk bad about an amp. If you care that much about winning the paper dB drag race, spend a lot of money to upgrade your charging system to provide a constant 14.4V, or get a much more expensive amp that makes an inaudible extra 200W so you can feel good about yourself.
This whole thing is similar to horsepower ratings in cars and motorcycles. Most all makers rate power at the crankshaft and ignore powertrain losses because it makes them look more powerful. Same with amps. Unless the amp is rated per CEA 2006, you can't compare amp ratings between brands because you really don't know. I hear so many people judge an amp by how underrated it is. Dishonest is dishonest whether the maker is overstating power or deliberately understating. If an amp is overbuilt, that is one thing, but honestly I would much rather know exactly what I am buying rather than hearing "conservatively rated to produce." What does that mean? To me it means that is will produce that amount of power and probably more. How much more? A lot? A little? Fact is I don't have the time, money or equipment to test every amp out there to see if it will meet the needs of my system. Last I checked, only IASCA was still using power classes and their classes were not the craziness that they were back in he 80's and 90's where 4 ohm rated power was all that mattered and it made a lot of sense for amp makers to grossly underrate their products 4 ohm power because that rating was what determined a competitor's power class in competitions. Since this system is pretty much dead it only makes sense for the amp makers to quit underrating the amps. Just to keep people from whining, give a range of power, a tolerance if you will, that the amp will produce. Obviously tighter tolerance components used in the construction of the amp will lead to tighter output range tolerance, but why keep up the charade? With the majority of consumers in the market for as much power as possible with the least expense, why would an amp maker want to underrate their amps?