Something went wrong with my sub. Its a Infinity perfect 10 running off a jensen 500watt amp at 1/2 gain. It was fine then 1 day it started to cut on and off, now its off. But when I touch/push on the cone it'll start for a lil bit then stop again. Anyone know whats wrong? Is it blown? Either way I'm not happy driving without a sub. So can anyone recommend a setup for me? I can't spend a lot on it yet, I just recently bought a turbo kit(and still waiting for it to come)

. I either want to buy a cheap sub for now then replace it with a better one(s) once I'm outta debt again. Which sub should I be looking at?