Have had trouble with driver side speakers crackling...dealer said head unit needs replacing, replaced with used unit and same problem...have read others with same problem, what could it be other then speakers (apperently OK)

 

Well have repaced radio, amp and now speaker and still the crackling when volume is turned up...seems to be a Lexus problem as have heard of several with same problem...aftermarket also very expensive as not many options as the speakers are very shallow.