Hello, A week ago, the midrange drivers went out on both sides. There was a knarzen/strange noise before that. At the next engine start they went about 3 seconds and then were gone. Yesterday they suddenly ran again one minute (I think it was just driver side. Could I not locate because I was on the highway) and then were out again. Connections I of course have all already checked and exchanged. The system: CD30mp3 standard radio by high signal in the trunk. There to the high low adapter (AMPIRE 55020) then by short cinch at sinuslive sl-a8005d power amplifier. Then by copper cable before to the crossover in the door. Loudspeakers and soft are from the MTX TX665S. Only the mid / lowtoner does not work. Subwoofers and tweeters work easily. Someone an idea what that could be?