Hi everyone.
I am a new member although I have been lurking around this forum on and off for a few years. I have built a 1500 cu.ft home theater in the basement and now want to upgrade my sub. I built a 6th order bandpass with 2 x 15" no name drivers. I managed to get a -3db of 35hz.
Now, I would like to build a new sub to replace this one. The idea of building a full size WO with 2X10" 0r 2X12" has crossed my mind. I have a question regarding the frequency response graph that appears here:
https://www.decware.com/whorn.htm

Is this in car response with the gain addition that the cabin usually supplies?

Here is what I am looking for:
Bass in the low 20's
Fast and accurate
Capable of THX certification (115db)

I will be using this sub mainly for HT (70% HT/30% music). I already have a stereo power amp of 400w rms per channel to drive it.

Will the WO fill the bill or do you have other suggestions? I have not purchased the drivers yet until I determine what I will be building.

I don't think the graph was in car. I am pretty sure it was 1m or something on that order.

That sub in a HW will definitely get you some low end. 2 in a HW might give substance to the name lol.

Good luck.

Robert