Hows it going guys. I recently bought a 2014 Mercedes e350 that had 2 speakers blown which I replaced and replaced majority of the tweeters plus replaced the rear deck subwoofer as well. Theres no rattling or anything but songs with continuous bass just distorts the heck out of the vocals and sounds terrible. A good portion of songs sound good without continuous bass but just cant seem to figure out whats going on. You guys think it could be the amplifier or what could be my issue. Thanks in advance

 

Can you use the menu options R/L + F/R to identify which channel is bad. Bad Amp channels can output DC into speakers voice-coils until the viring fuses open.

 

Are you playing music via blue tooth or radio? If it is Bluetooth from your phone for example, try turning the volume down directly on your phone. If you have your phone volume via Bluetooth set to “maximum” it can cause the speakers to limit and the distortion happens. Hope it is something simple like this for you.

 

2014 Harman Kardan audio systems are known to have issues. Do a search on this forum.