I have a 2014 L with the THX system and it has a mind of its own. Sometimes the radio will function perfectly, or sometimes the front speaker above the dash will echoe, then i have a loud popping noise coming from the door speaker, the popping noise can last a couple seconds or it wont stop until you kill the vehicle. I feel it has something to do with the amp, any idea where its located? I dont have the cash right now to take it in to see whats going on, has anyone had this issue, what would you check? Thanks in advance.