My current bow came with a stock D-10 string and wool scallop silencers, and it wasn't very quiet. Tied on cat whiskers instead of the wool, and it definitely helped.
Tried a custom Rhino string, that was louder.
Back to the original string - finally tried two small bundles of whiskers, and bingo… quietest yet.
My preference is one smallish set of whiskers, or Bateman wool puffs, on about 1/4 and 1/3's… but I 'll go with two small bundles of whiskers if it works better.
A 10 strand SBD D-10 replaced a fine custom string-I think Rhino-on my last bow, and made a world of difference. Gotta feed your bow what it likes.