I have a db drive okur 1000.1 amp, Ive had it in 2 cars in the past 2 years and its worked great. About 2 weeks ago subs cut out and I thought it was a blown fuse until I seen the protection light illuminated. It will play at low volumes but when I start to turn it up it goes back into protection idk what's wrong. I got it professionally installed in both cars buy the same person and I've never touched the settings on the amp. What could the problem be?