Starting a new product using cnc'd 25mm MDF rings, then CAD 1mm increments to create Tractrix curve from Volvotreter web site.
Dowel holes make for exact alignment.
Next version will be birch ply.
This one uses 1 inch throat.
Here's an outstanding DIY thread on Steronet Australia, showing amazing build of CNC'd and lathe turned MDF horns. I love it. It mirrors Romy the Cat's system.
Deep End DIY - My first speaker project - DIY Audio Projects - StereoNET
Thanks...the FP looks v nice....the B&C only USD$100 in PE.Well, the HF200 is 2" (not 1", that's a huge difference) and quite expensive. It's an excellent driver but smaller diaphragms often get still a better resolution/detail in the upper 1-2 octaves.
The FaitalPRO W6N8-120 looks very promising. Very linear in that range, relatively smooth roll-off. Not the highest spl for a midrange 6" though but in the horn still higher than the direct radiating bass. The Celestion NTR06-1705B is a very good choice too, linear and sounds excellent.
If you need more efficiency, the B&C 6MDN44 or the 18s 6ND410 are very good. The chassis will all be pushed by the horn at the lower end, I'm not sure how much of the high spl of the 18s (102dB) you can actually use though.
There are good, cheaper chassis out there too, if these are too expensive.
Thanks. To clarify, I said the B&C driver was US$100...I don't know the price of the FP driver...but I have a friend in Sydney who is a distributor.To build a smaller one first is a good idea. The Volvotreter horn works, nothing wrong using that one. If you want to change something later on, you can still build a different one.
The FP is a good choice. The Celestion got an even flatter, broader range but USD$100 sounds great for the FP.
I like the Yuichi horns very much, looks very nice, good job! I have 2 EV HR90 horns laying around, wanted to use them for a very long time. They aren't as nice as the Yuichi horns but well, I already have them (slot drivers too), so I'll build the speakers with it, I hope I can do it in the next few months.