I have a PB2-ISD, and it works well for me. It has plenty of power, and I have it tuned to 20 Hz. The room I have it in is only 2100 square feet. Nowhere near the size of yours. This past weekend I set up my buddy’s PB1-Plus. I used the Infinity RABOS setup disk, and SLP meter with outstanding results. After all the adjustments it blends seamlessly with the rest of his speakers. I will use the RABOS tools to measure the bass response of my sub, and room when I finish re-configuring my HT. If I need it (I didn’t with my PCi-46-16) I will get an ART 351 equalizer to adjust for room response. Enjoy.