Something I realize I don't know. \n\nLet's say I have a 2-way speaker. 90db sensitive, crossover at 1khz. \n\nIf I want to play a 5khz tone so that it's 90db in volume from 1m, I'm going to have to provide 1w of power (yes, there's some nuance about volts and current). \n\nWhat if I want to simultaneously play a 500Hz tone at the same volume? Is the SPL (out of the speaker) still 90db? Am I now consuming 1w (since 90db) or 2w (I'm actually driving two separate drivers that are each 90db)? \n\nAre the rules the same if a third tone is added? Say 5Khz?