John, I’m not sure if I follow completely but it looks like what you are saying is the STF-2 could take over at 90hz and that my receiver would allow the speakers to produce sounds between 90 and 100Hz despite the crossover being set at 100Hz? Or the STF-2 is capable of sounds over 90hz?
Another thing that kind of concerns me about STF-2 is that woofer points to the floor.

Wouldn’t that produce somewhat distorted sound?

I want a good punch and detail in the bass without the boom.
Also, I probably would want a sub that could be tuned to cutoff at certain low frequency as well.
M22 has a sharp drop in response at 90Hz.

PB13 Ultra is out of the price range. Too bad about the bump on PB12-nsd.

I will take a look at the Paradigms mentioned before. Although, I’m not sure if I like the idea of a used sub. Kind of like to have a warranty etc.
But I will take a look at that

Cheers, Arthur

BTW. M22 is on the way hoping to see it on Friday!!!!!!!