I am trying to choose the correct size subwoofer for home theater.Room size is 25x15 with 12ft vaulted ceiling,home is open floor.Kitchen and dining room comes off this area with no doors separating the three! Klipsch Reference RF-82 II on shortest wall where kitchen and dining come off,Klipsch Reference RS-52 II on longest side where seating is with 11ft allowing!Klipsch Reference RC-62 II.Looking at svs pb12-nsd to fill in the lows!Will 1 sub do the job?Your take on this would be appreciated.Thank you in advance!