It all started out as a pair of conicals on top of GRF's used as bass bins.
12 compound angle petals
Glued
Used 2 pack filler to make smooth transition from 12 sides to round - the throat is the key or else they sound weird / possibly honk.
Loaded with a JBL 2435Be compression driver
up and running
As a 3 way - time aligned (crucial for really cohesive sound)
on to 4 way
The mid horns are 76cm long and weigh ~25kgs.
GRF cabs with Eminence Kappa Pro LFII drivers upto 330Hz
Mid horn JBL 2482 driver , 330Hz upto 1250Hz
Upper mid JBL2435Be 1250Hz - 9000Hz
Eminence cheaper tweeter 9000Hz - 20000Hz
A pair
Thinking about the mid bass now - front loading
Modelling it
Cutting out
Back chamber for a Eminence Kappa 15"
Installed
Big - 92cm mouth, ~1.3m long
Quick lash up for a test
To Be Continued