Is there some way of "seeing" the forward axis in these shots, or was this ascertained by other measurment?
Inverse null, which I show in all of the XO plots, occurs at the foward axis, and I usually note where that occurs relative to the waveguide axis at a stated measuring distance.
Then, in the vertical polar maps, the response measurement on that axis becomes the reference, the red curve, and measurements are taken in 5° increments above and below there, out to +/- 20°, and overlaid, so as to show the forward lobe.
Earlier, I used the waveguide axis as the reference to figure out how systems behave and where the nulls occurred, so there may be some variance as to the reference in comparing vertical maps, but now, my standard is the forward axis, unless otherwise stated, so we can see if the nulls occur symmetrically about that reference.
I started from scratch and developed the protocol in this thread over the last two months, so you've witnessed its evolution into a design tool that anyone can implement right here. The first example of it appears in the DIY audio forum over a year ago. There are more snazzy ways to show this data in various measurement packages, as well.
I have no problem spending good money to build really high end crossovers for this, so long as this design and schematic will be about as close to perfect as I could get without having to create a new design...?
You are not hearing me, Simi. I'm saying this is merely an expedient for getting you up and running, and that you should just buy a pair of used M19 crossovers as a start for now.... :yes:
530029/9283=57.0967