References available on real life room "tuning"?

If windows are part of the problem Marigo Tuning dots really do work and are about the size of a 50 cent piece - one per small window, 2-4 on large windows

RW Have you talked to the Marigo fellow? He has good rational behind his window dots,is an avid and knowledgeable music lover, and offers his product with a no question guarantee. Have you tried them yourself? If not you might watch shooting off at the mouth when you have little but prejudice to share. And even if you feel obligated to share you perhaps you can find a way to do so courteously.