X3 on the Crystal Screamer. I have several like the DH Crystal Mistress and Twisted Sister that are pretty loud but the CS with a Real Hard striker like IPE or Snakewood, in the 3500 or higher on the Janka Hardness Chart, will make her SING. As 310 said in his post, the CS has that ear piercing craack. It will vibrate your eardrums like a very deep bass drum.