Ok well since you were there for my testing and how I did my testing lets do this by the notes then, and you cannot tell me a 1K5 is more power than a 2K6. I never did any RTA testing on the amps but the Stetsom amp had a 12 db crossover, hard turn on and off pop and the cooling fan was very loud. Now obviously these power specs do not say any company is better than another simply since all these amps are obviously not rated to be equal in power. If you wanted to have a test of 3 like rated amps from these companies it would be the DD M3, Sundown 2500, and Stetsom 2K5 1 ohm version. So obviously of the 3 the Sundown is the easiest on the electrical system and the Stetsom is the hardest.
DD M3 amp tested using a single 15" 9515 .75 ohm mono 14.1 volts dropping to 12.3 imp rise to 2.1 ohms= 2147 watts
Sundown 2000 tested on same sub .75 rising to 1.9 ohms 14.0 volts dropping to 12.5= 1964 watts
Did not test Stetsom 1k5 but tested Stetsom 2K6 clipped at .75 ohm since it is a 2 ohm rated amp
Stetsom 2K6 at 2 ohm mono rising to 4.3 ohms 14.1 volts dropping to 11.83= 2021 watts