And that is? Whats the average 'sweet spot' distance from the axle you have found?In experimenting with the placement of string silencers while shooting through a chronograph, I have found that the "sweet spot" where the bow is quietest, is also the spot where arrow speed is the fastest with the silencers installed.
They reduce excess movement of the string after release and help direct this energy to the arrow, sometimes resulting in a bump of a few feet per second in speed. The reduction in noise was judged just by our ears on an indoor range.
While "cat whiskers" did quiet the bow, they provided no increase in speed and most often a decrease as compared with some of the newer lower profile silencers. Any increase or decrease, of any of the silencers is negligible in my opinion, however any reduction of excess vibration or wasted motion is. The chrongraph and our ears seemed to bear this out.