Doing the maths, the NC502MP has 2.35V sensitivity to get 500W into 4 ohm speakers
Or it's 2.77V sensitivity to get 350W into 8 ohm speakers.
If you can output 2V (peak RMS), and that seems most likely, then you would be able to put 360W into 4 ohm, or 180W into 8 ohm.
Looked at another way, you'd be 1.4dB (4 ohm) or 2.8dB (8 ohm) down on the amplifier's peak output. You'd be getting some benefit over the NC252MP, but not the full extra benefit.
Man that sounds Like I am wasting $1k on minimal improvements.
Ill probably just cancel the order.
Any other amps, that you all could recommend?