THESE MODELS HAVE AMPLIFIER SOUND ISSUES THAT ROUTINELY CAUSE THE AMPLIFIER TO FAIL AND CUT THE SOUND. THIS COULD DEFINITELY CAUSE A CRASH BY DISTRACTING THE DRIVER. THE AMPS ARE EXTREMELY PRONE TO FAILING AND CAUSE EAR DEAFENING TONES, NO SOUND, CRACKLING ETC. THE PROBLEM IS EXTREME AND DEALERS HAVE NO APPARENT WAY OF RECTIFYING THE ISSUE. THE INTERNET IS LOADED WITH CUSTOMERS REPORTING THIS INCLUDING MYSELF. THIS IS A MANUFACTURING AND DESIGN FLAW THAT SHOULD FIXED. NORMAL DEVICE FAILURE IS FINE BUT THIS IS OVER THE TOP. MY CAR WENT TO THE DEALER ROUGHLY 4 TIMES DUE TO THIS. MY VEHICLE PRODUCED A EAR PIERCING SOUND IN MID WINTER WITH THE WINDOWS UP AND LUCKILY I WAS ABLE TO PULL OVER TO GAS STATION WHILE ATTEMPTING TO PROTECT MY EARS AND SHUT OFF THE CAR. I KNOW THIS SOUNDS SILLY BUT THE SOUND SYSTEM IS ROUGHLY 500W AND THAT MIXED WITH THE HIGH PITCHED TONES IS EAR DAMAGING. I'M LUCKY I DID NOT CRASH. THE ONLY WAY TO OPERATE THE VEHICLE SAFELY WAS PHYSICALLY UNPLUGGING THE AMPLIFIER. PLEASE HELP.