I've been listening to a UFO25TH, ZR2 and Caintuck F15s for a month or two now. Before that I was listening to a ZMA with the F15s.

I've had full range setups 20-20khz for years and years.

Short answer: You are correct. The speed at which the lower frequencies hit you can be startling at times, especially when you have the volume up a bit.

The Caintuck F15s will not rumble the house, yet amount of enjoyment from them is shocking.

I go back and forth with turning on and off the sub. It might be because the system isn’t properly setup with the sub yet.

I have not heard the ZF models. Since they have a larger baffle they will play lower.

I’ve had people think the sub is on when it’s been off.