Your expensive room treatments might probably making your system sound worse (and why you need to read the attached article)

[dminches]

The Vandersteen speaker setup uses a jig attached to the front of the cabinet with a built in laser.

 

[bonzo75]

I am curious. How do you find rooms with the channels reversed but the exhibitors don't know it?

Pick an orchestral side where first violin starts on left, then orchestra joins in (e.g. Scheherazade 4th movement). Violin will clearly start on right if channels are reversed