http://www.sundownaudio.com/misc/A1500_SpecSheet1.tif
The Massive Audio P series isn't really an exceptional amplifier line by the specs. That sheet came from the factory thats makes them and is for the P1500.1 model. Notice that 1% THD power @ 1 ohm is only 146 watts... that is not an error. You are at 2% THD before you get 1000 watts. To get the advertised 1500 watts you need a solid 14.4 volts and only then at over 2% THD. For that matter those are 100 Hz ratings and if you look at the lower right hand graph it loses power fairly significantly as you drop in frequency. The P3000.1 is nothing more than two of those in one chassis, take it as you will.
They aren't crappy amps... but they really don't deserve alot of the praise they get on the forums. For the money they are pretty good, that is true. They are also pretty efficient, another plus. If people like them so much and you can find enough guys to buy 100 units worth of them I can get sell you the equivalent of a P3000.1 for 300 dollars or so each and still turn a profit on them.