June 2011 horn
The diameter is 592mm (2 feet).
The contour is a modified Le Cleach. I wanted conflicting things:
A skinny horn, pure 13 degree conical, modelled well (good low end, a bit peaky), the Le Cleach modelled well (a touch less bass, smoother roll off) I hope what I achieve here is a combo of these two curves
The contour is a modified Le Cleach. I wanted conflicting things:
- a big initial angle of 13 degrees, which is a 1:4 slope. This angle is to match my B&C drivers' exit angle. Le Cleach horns with this initial angle are very short compared to the ones that people typically model, with a 0 degree throat angle.
- A substantially deeper horn than my last (I want good low end efficiency, to keep excursion minimal with a low crossover)
A skinny horn, pure 13 degree conical, modelled well (good low end, a bit peaky), the Le Cleach modelled well (a touch less bass, smoother roll off) I hope what I achieve here is a combo of these two curves
Detail of the throat. I cut 16 of these ribs, so this horn has 4 more to screw / slot into place. I used a straight router bit with a bearing on the end, to make multiple copies of the original rib.
I'm still deciding how to finish them. The easy way would be to mount a skin over the ribs, then caulk the back of the skin.
I'm still deciding how to finish them. The easy way would be to mount a skin over the ribs, then caulk the back of the skin.
Update
I ended up using scraps and plaster to fill in the horn sides. It sounded great, and had a clarity / presence that my coaxials don't, but I didn't get them as comfortable / integrated sounding. Eventually, I lost interest, sold the drivers and gave the horn away. Now I wish I still had the drivers - it would be great to reboot this project.