I have bitum on midhorns back, i might use stp black gold on high guide. High guide is not yet on that simulation. i´ll bet those polars is PIA to measure indoors, can´t go outdoors cause it´s freezing outside. speakers this size what is even correct way to measure?
I once made an indoor test with cardioid bass system. Two boxed woofers back to back and minidsp variable delay. By theory this kind of system has only narrow band for cardioid response, because of physical separation of sources.
Indoor measurements didn't give me much reasonable. So, go outdoors! Bass close to front wall or in-wall is very good but room modes are always there!
dbp nearwall1 single 0 180 vs bipole vs dipole 300ms 112.jpg
It all depends on level of precision that you want to achieve. Of course measurements can be done indoors too. It takes a little (or a lot) longer to get things right but it's not impossible.
Outdoor measuring is not expensive, it's just a bit complicated becuse it demands that everything is battery powered. Other than that i keep geting the cleanest and most resolving results outdoors. With anechoic chambers there are always problems with lower end of the spectrum. They are great for distortion measurements and all other types of measurements where the climate is/can be harsh.
this is issue with 4x12" on front.
upper woofers needs to be 190mm back them to match lower woofers, its just about limits to reference axle.
picture of all being on and just 2row uppers with same eq, lower woofers slightlty cancelling output allready
i have two sealed speakers, today i listened them to be endfired.
does not do much against the wall, but what it do it kind of accurate 70hz area but everything around kind of level up.
might be that these type of speakers need more space to work better
Bass boxes are playing!! F1 on top cause jbl high horns are delayed.
Cardioid setup made 100% vituixcad diffraction tool, i believe quite true under 100hz.
Bass is definitely most different i´ve had in this room.
12" on baffle aint that good as inlow 135hz horn was.