Sub tuning, you favorite house curve

I think something that is not often written about, is how to best tune sub. What I mean is not in room response, but the actual curve of the sub. Or in plain words how the sub rolls of.

With active filtering and Linkwitz Transform and sealed cabinet, we can pretty much do what we like. In reality no, if you don’t have a lot of watts on tap. And boosting to much we might run into digital clipping.

In the extreme we have flat line to 20 hz then gradual roll of from there. I guess with typical corner placement, and only one sub in the chain, that will in room give too big of a hump.

In the other spectrum we could have Qtc of 0.5 with gradual roll off from 100 hz and below.


In your experience what works best. Do you have a preference?