Originally Posted by chucky7
Let's see if I can help you. You have a Gamma 15 so,
Start with Gain @ 12 o'clock, LF Adjust @ Cut, Crossover @ 120 Hz/Out, Delay @ 0 ms, RCA input @ left. input switch @ RCA.
After you run auto calibration in your AVR, check your sub level. Try to aim for a - 6.
If you get a -10, turn the gain down, then rerun auto calibration; if you get a -3, turn it up, then rerun auto calibration.
If you have a -6, you are set. Then you can manually bump the sub level in the AVR speaker level setting.
Most people will increase say a -6 to 0 ( 6 dB hot ) or -6 to -3 ( 3 dB hot ).
After this, your sub is calibrated. Go watch a movie and report back.
After your sub is calibrated, any time you want to just turn down your sub, you should do so at your AVR speaker level setting, not with the gain on your sub.
If you adjusted the gain on your sub, you should run the auto calibration again.
Then you can adjust LF Adjust to taste. For Gamma 15, LF Adjust is boost only so Cut = 0, Boost = +6 dB. So if your room is small, you should leave it at closer to Cut. If your room is big, you can try somewhere between 12 o'clock ~ Boost.
See if the above works for you.
I finally have done the calibration.
In order to get -6dB, I have to set Gain to 2 o'clock (at 11 o'clock, it got +6dB, at 12, got + 2dB), anything else is set based on your suggestion.
After cal., I manually set it to 3dB hot (-3dB), I turn up LF adjust to about 9 o'clock, Crossover is way up (120Hz/Out), Delay 0ms.
Also, my Onkyo Rx doesn't have options to select Front/Center/Rear Small or Large but only display as Full Band or 40Hz/60Hz/80Hz THX/100Hz/120Hz/.....
So I set all speakers to 80Hz THX. Anything that I should take another look?
Also, side question, the -6dB Gain setting, is it applied for any sub or just a brand-dependent?