The amps are 1 ohm stable in stereo at 1000 watts rms per channel. You can run the amps at 1 ohm mono but I don't recommend it unless it's for comp. These are class ab amps and were built for sound quality and spl. They are also very efficient at high volume, probably as efficient as any class D and sound twice as nice. My asking price on these amps is 300 each plus shipping. I know that sounds like a lot but these amps retail for 2000 and are very capable of producing over 150db. I will sell them separate if desired. I also have two jbl 1200.1's for sale if these are out of your price range.