@jw944ts , if you were to measure your situation, at the listening position you are probably rolling off below 60 Hz. Very few speakers can project bass well below 80 Hz particularly low frequency dynamic impulses. The frequency response quoted by manufacturers is very misleading. You do not sit one meter from your speakers and bass rolls off fast with distance. I use four 12" subs and it still is not enough. I am going to go to eight 12" drivers. In your situation two 12" subwoofers would be the minimum. If used correctly your system will become cleaner at volume and go a lot louder. The two hardest issues to deal with in HiFi reproduction are bass and imaging. With bass it is important to focus on what you feel, not what you hear. On the bright side it is much easier to remember what you feel than what anything sounds like. I use small jazz venues for comparison.
low bass response
My system, which is shown on my profile, does not seem to produce the low bass I would expect it to. I listen near field, and my room is 13'x30'x9'....in your experience, is this most likely due to my room and near field position?