@James: Have you actually seen inside one of those Noize Control boxes? - the only info I can find on them shows a grille in the horn, so cannot tell what is happening in the throat. I also note that their info does not include response and polar plots....
The top / mid flares on the NCA Tmt were designed for 50 x 40 to allow the tight stacking of the trapezoidal boxes. Having FAFFED about with bits of wood and " the right hand width " distance to get the right dispersion when using F1 res stuff I can`t see why they went trapezoid in the first place !
I could take a foto for you of the TMT mid flare but I can`t give you the dimensions . It uses a small throat is all I can tell you at the mo`..! Raey is pretty elusive when it comes to design stuff ( rightly so if your selling the boxes ! but I can get some info out of him). It uses the rcf l10/750yk ( or a fane version which I`ll find out).
Plots and response charts are on the way but some new drivers are being tested at the mo ( neo ones to lighten the boxes for flying) so not sure which ones they`ll paste up.
And to stick my two pennies worth in.....
The f1 folded horn on the re4 / res 5 have phase bungs and the res 2 doesn`t. Just a point that the res 2 uses a 15" on a short fold with the driver reversed to keep the vc cool... A practical easy to build box which IMO is the route I`d be taking..? Only gripe I have with them is the x-over to the 218 always sounds "confused"? ( best description I can think of ..it`s not wrong , jusst not totaly right?). The all in one mid / high moulding is another winner in design but I should imagine the tooling costs are horriffic ....
So I`d go for something similiar to the res2 for the bass and try to combine that with a 50 x 40 flared mid/ top section to keep it simple and arrayable?
I`m no cad wizzard tho` so I`ll just grumble from the edges !
edit...The Fane 10" is a crescendo 10m