Well, db = 10 * log(p2/p1) 5w to 200w is actually +16 dB 100w to 1000w is +10 dB But hey, it's the thought that counts :-) -----Original Message----- From: Sam Morgan lots of difference between 5w to 200w = 18+db as compared to 100w to 1000w = 9+db hope I did the math correctly ;-/