Image/soundstage and punch/bass

Man, I didn’t know ET was still around, let alone making speakers. I have a bunch of Rythmik subs here, but the ones in my main system--- a pair of sealed 15" are crossed over pretty low- and "punch" to me, is more upper bass, not just deep bass. How high do you run these Rythmiks out of curiosity?

@bdp24 - yep, i remember when that fan type driver was introduced.

All: coming back to my question, isn’t "thwack" or "punch" higher in range than sub-bass typically produced by subwoofers? What settings are you using on subs -I tend to cross mine over very low and even though there is a slope and some upper level harmonics, the energy is really much lower at least in how I use a subwoofer. So, I’m curious where people are crossing over if they think "punch" is achieved by adding subwoofering.
(I appreciate the multi-sub approach, room set up, phase, etc. I cheat and use a DSP on the subs that doesn’t affect my main system).