THX Reference Levels

[Shimei]

Interesting find yesterday. I noticed when reaching 82 on the volume level of my Onkyo PR-RZ5100 that Reference Level displays. Perhaps some already know about the THX Reference Level if not then you may find this interesting. THX Reference Levels specifies that your subwoofer peaks are 115dB while the rest of your speakers will peak at 105dB. After the calibration process of the Onkyo this is reached at 82 on the volume knob. However, looking at the actual calibration and seeing the gains as such:

 

Calibrated Gains:

LF -12db
C -14db
RF -12db
S  -15db

 

The more sensitive the speaker the more minus gain you'll probably find your THX calibration performs. 

 

I changed the gains to:

 

LF  0db
C -2db
RF 0db
S -3db 

 

As you may note the differences remain the same. However, now the THX Reference Level is reached at a lower volume setting on the knob. Does anyone see an issue making these changes? 

 

I need to purchase an SPL meter in order to find the new THX Reference Level on the volume knob which I suspect might be around 70 now.