This speaker have very "boxy sound" do you think use some deadening foam on the speaker box wall and some polyfill cotton will improve the overall sound quality?

Sound quite good but should be support lossless audio from apple music while it's not bad but lousy audio limited their potential,sonos should fix this but their apps are really terrible which sonos seems not give a %#*@ about it. Now I know why many people go back to Bose.if I opened it up I will put some car door sound deadening to prevent the speaker vibrate at louder volume.