#amp

So, I had just picked up a Rockford Fosgate P300-2. A 2-channel amp. I had purchased it for 20$ knowing it wasn't working. But I was hoping it was just a blown fuse. Either way I have a good (In my perspective) amplifier. So, I crack it open, and I find that the right-hand side MOSFETs are blown...

I have two subwoofers in a box; both Kicker Comp R's. They are 500 Watt RMS at 4 ohms. I'm not sure what amp(s) I should get and how it should be wired. My max budget is preferably $150 or less. Thank you in advance!