In several previous threads I have lamented about my lack of tactile bass relative to other systems with far inferior subs. I have attributed this to my HT being on a cement slab, as opposed to a suspended wood floor. This weekend, I set up a friend's system, without a sub, using his rather large SEAS tower speakers in 'large' mode to cover the bass. His system is being driven by my trusty old Okyo TX-DS575X receiver. Lo and behold, once again the suspended wood floor transmits tactile sensation much better than my cement slab- WITHOUT A SUB EVEN IN THE SYSTEM. Sure, my bass is of better quality, but his floor shakes, enhancing the overall effect. On to my question. I currently use a SVS 25-31PC Plus. My system is calibrated, and the sub never breaks a sweat- it is never even close to distorting. Would an even larger sub with 2 drivers, such as the PB2 Plus, or some other humungous sub, enhance my HT experience? I ask this because my current sub never comes close to it's full potential, but would more drivers somehow increase impact? Turning up my current sub to higher volume is not an option- I don't like the bloated sound that goes along with it. So... Would a bigger sub help? I'm not looking for a constant throb, which I could gain from simply turning up my present sub. I'm looking for more impact when called for. Thanks for any opinions.