Mines not the JBL system just premium sound, I do however have the voltage stepdown harness thing I got from Circuit City to lower the power going to the amp.kickeralpine said:are you running the jbl factory amp with the pioneer if you are this is the problem you are putting to many volts trought the amp you will need to buy the bypass harness for the prem sound im mecp cert and have done this for 16 years and work for best buy know your pre volts are to much for the jbl amp and will pop and you problly max out the radio on volum 10 right let me know and i will help you out