I guess their was an issure with the voice coil. Honestly im not entirely sure, i bout if off of ebay, and had a hell of a time getting it warrentied. They had terrible communication with me. I bought it july 17th and it was returned to them by the 20th and i literally just recieved it today. It came directly back from alpine, so as far as i know it should work 100% if not i will refund the money.