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In Reply to: RE: Round 80hz exponential horn usage 100 hz to 500 hz posted by SETisfied on February 04, 2017 at 20:00:23
Spruce would be ideal but probably too expensive. Poplar might be fine but it is not as stable. I fear oak is much too hard and again I would worry how much it would move as time goes by. I think you want a little "give" in the horn which the poplar, unlike almost all hardwoods, would allow. Oak would be very expensive and very heavy. I think one is better off adding mass with wall thickness with the fir.
John Inlow, maker of the papier mache horn, will be making a set of horns for me where his plan is to glue up 2 X 4 framing lumber (douglas fir) and then to cut the circles to make the horn. He is waiting for some trick woodworking machine before starting. I am waiting patiently.
I would think this to be plenty good for both of our applications.
Who is going to do the fabrication? If you are doing it yourself you have my admiration. If not, you should contact Mr. Inlow (inlowsound.com) to hear what he thinks.
I had a pair of horns made by a fellow in Hungary which required a tremendous amount of work to be usable and are still not right which is why I am going to try it again. I offer this as a warning not to jump too quickly if not doing this yourself.
I am in touch with John inlow. He did suggest fir.Depending on specie I read that spruce and poplar,are close in density. Being that it is for the lower frequency ...I am leaning towards the fir as it is definitely more dense than poplar and spruce. I agree that oak will be too heavy.
What frequency horns are you.having John make.?
He had designed the horn that was made by the fellow in Hungary but he screwed them up and John had to come up with new dimensions to get what he had done to work.
They were supposed to be round versions of his horn using the 12" B&C.
What I have has a very hard time getting above 400 hz.
I am intrigued by his smaller horn using the B&C 8" driver. Figure that fits more in the Romy model which I think is an excellent one.
I wanted to use two per side but found I do not have the room. I will go with two and ask a bit more from my Edgar SEISMIC subs.
Glad to hear you are talking to one of the audio greats in my most unhumble opinion.
i saw your post and interest in the inlow mid bass horn and wanted to let you know that i have a pair for sale.
let me know if you are interested.
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