I didn't blow the fuse or pop it, it was just broken, maybe from shipping. I drove to the store, popped in a new fuse, and (thankfully) everything powered right up.
However...the sub is SO quiet. I turned off the low pass and could hear it playing music...so I know it is getting a signal...but there is no way it is getting enough juice (at least that's what I think).
I am only using 2 of my 4 channels on the amp. I'm running it in 4 ohms bridge mode. (USX4065) Also right now I have a 80A fuse in there.... but my book says to use "20A X 2". So I need two inline fuses???
Thanks for your help Honkey.