>>775
マスターボリュームを0dBにすればどんなアンプやスピーカーでも同じ音量になる
MVが下がるほど推定音圧と実際の音圧はシステムによって違いは出てくるが大きな差は出ない

THX reference level explained
http://www.acousticfrontiers.com/2013314thx-reference-level/

Get better sound from your AV receiver using your smartphone
https://www.cnet.com/how-to/how-to-improve-your-av-receivers-sound-quality/

DENON
https://denon.custhelp.com/app/answers/detail/a_id/54/
PIONEER
https://i.imgur.com/bWVy9vg.jpg

Question about "Reference Volume" and receiver display volume!
https://forums.audioholics.com/forums/threads/question-about-reference-volume-and-receiver-display-volume.114753/