I'm talking about calibrating to 75dB using test tones and then watching a DVD or listening to a CD with the volume at the 0dB position, not listening to material at a measured level of 75dB. If it's just me watching, I generally have my volume control around -15dB for CD's and -10dB to -5dB for DVD's. With others in the room, I tend to watch DVD's around -20dB. I very rarely push the volume up to the 0dB point.
It might be worthwhile for me to clarify something from my earlier post. I am not saying that to listen with the volume set to 0dB (or whatever other position you calibrated the system at) is strange, unusual, or excessive. There's of course no reason to avoid doing this, or to feel bad about if it you listen at this volume. On the other hand, there have been threads in the past where many people indicated that they almost never turned the volume up that loud, and that's OK too. Some people have even elected to calibrate the 0dB colume level to a different level with the test tones (such as 80dB on the meter, or 65dB on the meter). As with many other things in this hobby, there are no cast-in-stone requirements for calibration - it's best to take a recommended guideline such as that outlined in the 950's manual and then modify if necessary to suit your system and listening habits.