I'm trying to optimize my new PB10-NSD for my 25X11X8 (2200 cubic ft.) room. I have Avia and a RS SPL meter and used them to calibrate the sub. However, I need to find out what is happening in my room so as to decide whether I need to upgrade to the PB12-NSD. Is there some type of idiot's thread or link that someone can point me to that provides detailes instructions on how to get basic readings for my room? I downloaded the Excel Room Calculator, and I have a SPL meter, but I am completely lost from there. Do I need anything else? I did a search, but I realized that I don't even know what I am searching for..."How to use room calculator?"?????? Anyway, any help I can get would be appreciated. Thanks.