This is either a completely noob question, a completely unanswerable question, or both... :b I know it will completely depend on the specifics of the room, but is there any way to guesstimate the maximum room size the little Dayton 300-632 sub can handle for typical home theater spl levels? I'm not talking about shaking pictures off the wall with SVS Ultra/2 levels - just good general home theater & music for the family. In other words, is there a general calc I can use to estimate the max spl of a powered sub for a given room volume & distance from the listening position? Is there software or a white paper I could use as a reference? Math doesn't scare me... As a follow-up, is there a way to estimate what the addition in spl would be for adding a second Dayton sub to a room? Thanks!