I know this sounds like a stupid question and reflects my complete lack of knowledge on the subject, but I did have a couple questions for some of you that have a wealth of knowledge. If I calibrated my sub and had to turn the volume knob down to 1/3 of its volume capability in order to achieve calibration, why would I need a bigger more powerful sub. I am sure the SVS line of subs would produce tighter and quicker bass but as I understand it would not be any louder, or else I would need to just turn it down to have it calibrated correctly. I guess I need an education on the difference between a high end sub and a low end sub. The sub I use was practically free, the JBL PB-12 that I got for $250. I know its a low end machine but it sounds good, but I keep reading about these big powerfull subs and after watching U-571 am wondering how a dual SVS would sound or would it be turned down so low it would not benifey the extra costs.