subwoofer pop when powering on
I just installed a Pioneer Avic D3 last night in a friends F150. I used the correct bypass to plug into the sub. Everything works fine.. the sub fires nicely, just as it did before. However, when you turn the vehicle on you hear a pop on the subwoofer (radio volume is turned down). It is the factory amp/sub. Any thoughts as to why the sub would pop when receiving power? FYI - the power is hooked up to a switched source.