Gonk:
Unfortunately, channel calibration is NOT global. If I calibrate a regular input to, say, -5dB and then switch to the CD input set for Upsample, that CD input will be +5dB louder than the regular input because the channel calibration doesn't apply to it.

So then to get the CD input at Upsample set to -3dB below the regular input, you'd need to set the 2-ch offset to -8 - which, by the way, is the lowest it goes. If you have to set the regular in put in the above case to -8dB to get the sub to balance correctly and you wanted the CD input at Upsample to be -3dB below the regular input, it would be impossible since the CD input would then need to be at -11dB which it can't go to.

As Skyblazer said - "It's either to low for home theater and to loud for 2 channel listening. Not sure if this is the problem or not." What he is experiencing is EXACTLY the problem I described above. He may be able to use the 2-ch Offset to lower the 2 channel music to an acceptable level unless he had to set the Sub Offset to some level that would not let him do this.

2-ch offset is not a value that is additive to the regular sub offset.

I had to calibrate my system so that the sub offset was 0dB by adjusting the volume of my subs to below what SVS recommends. Then the 2-ch offset could be used to acceptably lower the sub volume for 2 channel music.

I've worked around it for my setup but this is NOT how the sub offsetting should work. It doesn't make sense and is not global like every other pre/pro and receiver I've owned.