1986 Mercedes-Benz 300e 5 speed
So I have installed a JVC head unit in my 1986 300e about 4 months ago. All was well with the speakers and sound, never blasted my music as thats not how I like to listen to music. But i noticed that while i pushed the sound to say 70% of max, it began to sound muffled and distorted. I think it maybe a wiring problem because it sounds muffled in the back and front and that the head unit may not be delivering enough power to the speakers. Anyone have this issue or any help is much appreciated?