My Samsung QN55QN95BAFXZA have a sound speaker bass distortion when use with the volume level 13.
If I set the volume level to 30 is even worse. I have the lastest firmware installed (1420), have reset the tv hub/ reset sound, and still have the sound bass distortion when using the sound setting to AMPLIFY, if I set the sound setting to STANDARD there is not distortion.
Today a technician came and change the PEQ-INX setting from 540 to 1 using a service remote control which helped with the distortion.
Now I'm getting the same remote to play with this setting to see how high I can get without distortion.
I'm actually on 1420 firmware.
Samsung could fix this via firmware, but we all know how "efficient" Samsung is with firmware updates..
I bought my tv directly from Samsung