In light of what was being said here yesterday I checked it out last night. I shot some arrows through the chrono with the string suppressor in place and with it off to the side. Same speeds on all arrows shot. No increase, no decrease. The arrow spines a bit weak for the bow at its' current setting but I don't see where that would make a difference. This particular arrow is very heavyso I am going to try this with a lighter arrow and see what happens also. I am also going to try it on some other bows with different DW's too.

I really didn't expect to see much speed difference so I wasn't really surprised. There was a difference in string noise, less with the suppressor, but, to be real honest, the bow(s) I have them on are pretty quiet anyway.