This morning i went out to start the truck up and noticed a constant hum coming from my woofer..Ive had my amp and sub and everything for a year and a half now and its never done this before...Its pretty loud i dont know what to do and i dont wanna just go pushin buttin and switches on my amp. SO someone who knows how to fix this help me out please...
Thanks

 

I'd check your wires. It's possible something has come a little loose or the insulation has been rubbed/chaffed off. If that doesn't work craigslist has some great deals on amps...