Do the measurements as per the manual but also allow for some "wiggle room" based on your listening preferences. In my personal listening experiences and those of others with whom I've corresponded, the consensus is that tilting back just a slight bit more than measurements would indicate can yield a very satisfying sound...a bit less treble emphasis. Doing the opposite can accentuate the treble to a slight degree. It's all a matter of taste. Some like it hot, some not!
Vandersteen tilt question
When looking at the manual’s tilt chart “distance from speakers”, is it looking for:
1. Distance from listener to plane of speakers, or
2. Distance from listener to each speaker.
For example (for illustrative purposes only, not suggesting this layout), if speakers and listener formed a triangle, with distance between speakers of 12 feet, and the other 2 sides 10 feet, would the chart be looking for 8 feet, or 10 feet?
I’ve had numerous Vandersteen’s and always assumed it was looking for number 1 above. Anyone know for certain?