If that’s true, it’s in a class BELOW everything else since no body in their right minds these days should make space-heater amps that are so inefficient. Unless they intend to also use them as space heaters in the winter time.
These days, smarter engineers are moving toward closer to 100% efficiency, pure power, and cool-operating amps, not volcano dinosaur amps that were made a 1000 years ago by less experienced engineers.