I had a powered subwoofer in my car which was getting signal from the rear deck subwoofers. Last weekend, I heard noises coming from the back of the car while driving so I pulled over and noticed that smoke was coming out of the amp and my right rear deck sub. I disconnected them both and both of them were damaged. A few days later, I try to start my car and the battery is completely dead!

Anyone have any ideas? help!!!

 

Sorry to hear that.
You'll get more help if you post this in the Audio & Video section: https://acurazine.com/forums/audio-video-electronics-navigation-22/

 

Do you have a capacitor in there? if you do, make sure there's A RELAY working properly. The relay is supposed to disconnect the cap when u shut the engine or sound system off. Since a cao is always discharging slowly, and power is contantly replenished by your car battery, it'll go dead pretty quick if the relay doesn't disconnect.