For me, I can find:
1- EQ menu (lol)
2- Advanced Audio > TV Dialog Settings menu
3- Advanced Audio > SUB Settings menu
4- Advanced Audio > Surround Settings menu
5- TV Control (Night Sound and Speech Enhancement)
6- Advanced Settings > Audio Compression
SIX DIFFERENT PLACES but I gave up counting all of them and assume I could have found more...
Hey Sonos, how about putting everything in one menu that's easy to get to since everyone is constantly having to adjust sound levels depending on the source. Even better would be to add an actual equalizer where you can adjust the levels of different frequencies and save/load presets—you know, the way that pretty much all audio equipment has been doing for the last 40 years.