Hey Tony!
The power delivered to the sub depends on the load that you are presenting to the amp with the woofer. If you have it loaded down just right though, you are delivering about 350 watts to the sub.
I assume you want to use the other half of the amp for the Pro 80's? If I am assuming correctly, you will be delivering roughly 120 watts to each Pro 80; It will drive them, but I know that you can put more power to them as well...
Let me know if my assumptions are correct! Hopefully so...
Phil
Kicker