I have not read all the posts but:
Will 12 inch subwoofer be enough for an 18x20 room (with 10 ft cielings)
In short: no it will not.
Most of us has not since 1933 we know that if you want to be able to HEAR a sinus wavelength at 20Hz when you play at normal 80 db @ 1000 hz. Then you need to play the at 20 hz @ 120 db (!).
So when we study the graphs over what our ears are able to hear and at what sound pressure that is needed to have for us to be able to hear it.
https://en.m.wikipedia.org/wiki/Equal-loudness_contour
So the solution is much more cone area is needed and power. Then let a DSP mimic the courve in the link above. Then it is "enough".
I am in progress to building 2 18" that will perhaps rather close to the listening area and my miniDSP will help me. Maybe I will reach my goal. (Oh and it is OB that is another problem with that low efficiency).
Will 12 inch subwoofer be enough for an 18x20 room (with 10 ft cielings)
In short: no it will not.
Most of us has not since 1933 we know that if you want to be able to HEAR a sinus wavelength at 20Hz when you play at normal 80 db @ 1000 hz. Then you need to play the at 20 hz @ 120 db (!).
So when we study the graphs over what our ears are able to hear and at what sound pressure that is needed to have for us to be able to hear it.
https://en.m.wikipedia.org/wiki/Equal-loudness_contour
So the solution is much more cone area is needed and power. Then let a DSP mimic the courve in the link above. Then it is "enough".
I am in progress to building 2 18" that will perhaps rather close to the listening area and my miniDSP will help me. Maybe I will reach my goal. (Oh and it is OB that is another problem with that low efficiency).