What is BearcityUSA's room size? Or Dennis'?
Room reinforcement is paramount regarding bass and mid-bass response for any speaker.
Omega speakers don't need notch filters, IMO. I've owned countless wideband-driver speaker systems, most of them much more expensive than Omega's offerings, and these - or at least the Super 6 Alnico XRS which I now own - are among a select few that are properly balanced.
Again, though, we're not talking about bass, which is highly room-dependent.