[BScout]

Originally Posted by SDDP

Couldn't find the answer to this anywhere. Recently had to re-calibrate my JBL LSR 5.1 Speakers. I know the sub should be around 4-5db higher. But would I have to first turn off the +10db Gain and calibrate it 4-5db and once done, then set it back to +10db?
Or calibrate it with the +10 gain on?

with +10dB on
And it isn't "around 4-5dB higher"
It is exactly 10dB higher for the in-band frequencies (40Hz-120Hz for cinema, pink noise)

An easy way to do this is measure the level of the band-limited pink noise of 40Hz-120Hz on your left speaker.
Then measure the LFE channel -- it should be 10 db higher for the same band-limited pink noise.

(this is assuming you have good L/C/R that can properly produce down to 40Hz)