2009 Mitsubishi Lancer electrical system problems

I have an 09 mitsubishi lancer es sport with the sun and sound package. The amplifier, which is under my drivers side seat, for the soundsystem started smoking and sparking. I took it to the dealership, who replaced it a month ago, and a week ago, while I was driving, it started smoking and sparking again, but stops when you power off the radio, if the power is on in the radio, it continues to smoke and spark.

The contact owns a 2009 Mitsubishi Lancer. The contact stated that after the vehicle had sat for over five days undriven, the vehicle had to be jump started. The contact mentioned that the failure recurred several times. The vehicle was taken to an independent mechanic and was diagnosed that the battery needed to be replaced. The vehicle was repaired however, the failure persisted. The vehicle was taken to another independent mechanic where the failure was undetermined.