I find this article very helpful to understand THX and dB levels in my Denon Receiver.
www.acousticfrontiers.com
THX reference level explained
What is ‘THX Reference Level’? Reference level is a calibrated volume setting used for both movie production (in dubbing stages and post production houses) and reproduction (in screening rooms and theaters). The human hearing system is non-linear, especially in the bass, so having a consistent...
www.acousticfrontiers.com
