Now that my friend marty has finally done the "big reveal" of his new speakers and has chosen the Wilson X2 S2 as his last best speakerI feel I can now comment about the simple, quick and much to my amazement a highly effective tweak he used to help my system..
http://www.whatsbestforum.com/showt...at-loudspeaker&p=429261&viewfull=1#post429261
I have known marty for many years and his scientific approach to audio has never ceased to amaze me. I knew 6 weeks ago when he was tearing the hair out of his head with the set up of the speakers that he would get it right. What I found fascinating was the comments about rake angle of the woofer module of the speaker. The longest part of this very simple exercise was the drive to Home Depot to buy a digital level. Using a bubble level my speakers were completely level however when we used the digital level my right speaker was down 0.1 degree and my left speaker was down 0.3 degrees. Marty has found that a quarter turn elongation of the spikes on the front corrects a 0.1 degree change. I was amazed that in fact that was the case and in less than 10 minutes we were done.
Overall effect was a much tighter and better defined bass. I would never have imagined such a small change would create such a big change but nonetheless the facts were the facts. In our measurements with the digital level we also found that even though the bubble stated that my speakers were level the digital level showed a 0.2 degree canting inwards of each speaker. Apparently according to Sunnil Merchant a small 0.2 degree inward cant has been shown for reasons unknown to improve the sound so we decided that what I had was a good thing and we left this unchanged and without correction.
Perhaps marty might find time to comment here as well abut the changes we heard when we adjusted the rake angle of each speaker upward by 0.1-0.3 degrees as the change was more than subtle. This reminded me of a small 1/4" toe out Nick Doshi had me do with my speakers. That change resulted in widening the sound stage at each ear by 8-9 inches. Previously my speaker set up was by Wilson recommendations where the tweeter was focused at each ear. That 1/4" toe out created a huge change at the listening position so I am sure that changing the rake angle by such a small amount resulted in the improved bass we were hearing
Impressive. The change needs to be a sticky