I believe that a string suppressor does a big difference. Example: I bought new Marquis this year and it come with a string suppressor and no string silencer on the string except on the cable. My bow is very quiet. Another guy that lives in town has an 07 guardian and put new strings and but didn't replace the silencers, the other day when I was at the range I noticed his bow was making allot of noise but couldn't figure out why. So i started looking at his bow and then it clicked. he doesn't have the string silencers on his bow, and neither does mine but mine has the string suppressor! So I believe a suppressor does a big difference.