This is a black loaded horn for the Fostex FX120. I was drawn to the FX120 because it has a pretty smooth response (for a Fostex full ranger) and a pretty big Xmax of 2mm (again by Fostex full range standards). There is a pair of these winging their way from Wisconsin as I type.
The horn has a two meter path length, ~ one meter height and 14cm (7.5") internal width so it's significantly bigger than either my Bugel Horn or Little Big Horn. It has the same basic folding as the Little Big Horn, which I've found to be efficient and effective.
As always, advice/comments/suggestions are welcome.
Re: the name - does it mean a fairly large horn or attractive large horn? Yes. 😉
The horn has a two meter path length, ~ one meter height and 14cm (7.5") internal width so it's significantly bigger than either my Bugel Horn or Little Big Horn. It has the same basic folding as the Little Big Horn, which I've found to be efficient and effective.
As always, advice/comments/suggestions are welcome.
Re: the name - does it mean a fairly large horn or attractive large horn? Yes. 😉
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Wow! I love the floor exit -- you cleverly avoid a 90-degree fold in wood. Right off the bat, it looks like there are a couple ways to enlarge the chamber by recovering some volume in the null areas.
Really nice! It will be very interesting to see what drivers can work (given the ability to adjust chamber volume).
Edit: Denis you are too generous -- I'm more of a shameless groupie. 🙂
Really nice! It will be very interesting to see what drivers can work (given the ability to adjust chamber volume).
Edit: Denis you are too generous -- I'm more of a shameless groupie. 🙂
For a pretty damned big back loaded horn, check out Nelson Pass' Kleinhorn
"pretty" as in visually appealing is of course in the eye of the beholder, but as far as dimensions are concerned, of that there is no dispute
"pretty" as in visually appealing is of course in the eye of the beholder, but as far as dimensions are concerned, of that there is no dispute
I'd love to hear them, the "industrial look" would more than wave a red flag around here though!
Don🙂
Don🙂
Something else those aren't they, make the Sakicho's look small and that takes some doing.
-- Andrew
-- Andrew
I forgot to mention; these are going to use the same materials as the Bugels and Little Bigs - solid poplar boards( 1X 8 this time) and plywood sides. I really like being able to screw into the edges of the poplar boards and get a firm grip.
Here it is in the flesh/wood. With some luck I'll have one together and making sound today.
I've decided to make the front baffle and throat wedge removable and interchangeable. This will give me maximum flexibility in trying other drivers. For instance, Hornresp shows that the speaker should work very well with the Fostex FE166E with a small change to the CC volume and throat wedge.
I've decided to make the front baffle and throat wedge removable and interchangeable. This will give me maximum flexibility in trying other drivers. For instance, Hornresp shows that the speaker should work very well with the Fostex FE166E with a small change to the CC volume and throat wedge.
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Hi Denis, wow the interchangeable wedge sounds excellent. So is that purely for the purpose of altering the throat size?
They look fab dhenryp, I must take a look at Horn resp sometime my Foxtex 208ESigmas sound brilliant in the Sachiko (Scott did a fab job on the design) that sound in a smaller cabinet would be interesting!
-- Andrew
-- Andrew
The FX120 has a quarter inch thick bezel which I haven't recessed into the baffle. The first measurements I took were pretty ragged above 10k and I think it is related to reflections off the bezel.
I added a piece of quarter inch felt around the speaker and took new driver measurements. You can see that the 10k + area has been largely cleaned up.
I added a piece of quarter inch felt around the speaker and took new driver measurements. You can see that the 10k + area has been largely cleaned up.
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Denis, building a horn is supposed to take a long time. 🙂
May I ask your process for coming up with various initial (and final) values? For example, do you first come up with a goal for the LF, then work backwards to the mouth size, path length etc.?
Or do you start out with the chamber (Vtc) and throat (Atc)? Or...?
May I ask your process for coming up with various initial (and final) values? For example, do you first come up with a goal for the LF, then work backwards to the mouth size, path length etc.?
Or do you start out with the chamber (Vtc) and throat (Atc)? Or...?
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