An increase of 3db requires a doubling of power.

Klipsch
97db = 1W
100db = 2W
103db = 4W
106db = 8W
109db = 16W
112db = 32W
115db = 64W

NHT
85db = 1W
88db = 2W
91db = 4W
94db = 8W
97db = 16W
100W = 32W
103db = 64W
106db = 128W
109db = 256W
112db = 512W
115db = 1024W

I'm sorry in the previous post I listed the Klipsch incorrectly as needing 64W at 112db, it should have been 32W.