1 magtech is 500W rms at 8 ohm and 900W at 4 Ohm, more if your house supplied enough power for the amp, say a 240 line.
the magtech is one helluva amplifier, you may need only 1.
Roger has a 30 day in home trial, if you don't like it, send back, im sure you will be more than satisfied with the power this amp will throw.