I mentioned to Bill just this morning that what the world needs is a 3d-printed SEOS to Celestion adaptor.
Seeing as I'm back in Portland, I'll ping you for information about this (could be fun!) and that'd kick me into higher gear to finish my project(s).
x2, I may have few real-life skills, but moving large, awkwardly shaped objects is in my wheelhouse.
I yet have to get the son-in-law to help me bring home 10 sheets of ply, after I clear a place I can keep them flat down and dry till I get to them.
hehe, well, only the small part in the middle is printed (a 'stub' of a horn, with initial contours, CD and midrange mounts). The rest is plywood.
I doubt that biga** speakers in a house would be a big selling point these days..
I doubt that biga** speakers in a house would be a big selling point these days..
Maybe I missed it, but what kind of woofers are you going tu use? Still the small faitals or bigger ones?
Hi castorG
The plan for the Behemoth Horn is to use two Eminence DeltaLite 2512 per box. To make good use of the large volume that will be inside, and to keep weight down so they won't be too difficult to carry up steps (2 person, though).
The project is on hold till this spring, though. Too cold out in the (unheated) garage and it would be too much of a fire hazard if I tried to heat it, since it's too small to put in a space heater and still keep it away from burnable things.
The plan for the Behemoth Horn is to use two Eminence DeltaLite 2512 per box. To make good use of the large volume that will be inside, and to keep weight down so they won't be too difficult to carry up steps (2 person, though).
The project is on hold till this spring, though. Too cold out in the (unheated) garage and it would be too much of a fire hazard if I tried to heat it, since it's too small to put in a space heater and still keep it away from burnable things.
Bill, wouldn't overall sensitivity be 2-3dB lower with 1, instead of 2 Celestions TF0410MR?
Moreover, you've exchanged the small Celestion for the Peerless, but I guess the Celestion CDX1-1747 could be used as well?
This is driver is used in Paul Spencer's PSE-144 and according to Earl K's measurements it's comparable with the Peerless, even though the top end looks a bit ragged.
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I was mistaken, obviously you swapped the Peerless for the DNA-360.
Both the DNA-360 and the Peerless are hard to obtain here in Europe, therefore the CDX1-1747 (which is the bigger brother of the 1745) appears to be a nice substitute.
For what it's worth, here's the response of the CDX1-1747 with Celestions own H1 9040P exponential horn:
Both the DNA-360 and the Peerless are hard to obtain here in Europe, therefore the CDX1-1747 (which is the bigger brother of the 1745) appears to be a nice substitute.
For what it's worth, here's the response of the CDX1-1747 with Celestions own H1 9040P exponential horn:
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Ro808 --
The DNA360 is an almost exact clone of the B&C DE250, they are essentially interchangeable.
With two midranges actually gets 6dB more sensitivity than one, but becomes nominally 4 ohms instead of 8 ohms. But it doesn't mean too much, one is still sensitive enough. The midrange isn't the limiting factor on overall sensitivity. Just changes the crossover components some.
The DNA360 is an almost exact clone of the B&C DE250, they are essentially interchangeable.
With two midranges actually gets 6dB more sensitivity than one, but becomes nominally 4 ohms instead of 8 ohms. But it doesn't mean too much, one is still sensitive enough. The midrange isn't the limiting factor on overall sensitivity. Just changes the crossover components some.
I am aware of the DNA-360, its qualities and its origin. I remember posting in the "Hey guys..." thread, at the time Erich was sourcing components before he started DIYSG.
Unfortunately, a B&C DE-250 manufactured between (roughly) 2015-2018 is not identical to a DE-250 from 2010. For this reason Earl Geddes switched to the B&C DE-500.
Anyway, I could always order a pair of DNA-360s (and bear the pain from the shipping costs ;-)
As for using 1 versus 2 mids, I have absolute faith in your experience and opinion.
I have read the "Suitable midrange cone, for bandpass mid in Unity horn" thread and from what I remember the mids are seldom the limiting factor, unless you combine a larger (≥ 1.4") compression driver with small, low-sensitivity mids. Sensitivity of a Unity/Synergy horn is largely defined by its shape (shallow vs. wide and short vs. long).
I hope you had a nice day at the local audio club meeting and I have no doubt your speakers were (by far) "Best of show".
Still, it would be nice to read some comments though😀
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Those are 4x8 (96"x48", or 234cm x 122cm).
(You're talking about the cabs for the big printed waveguides, right?).
For 5x5 types, you'd have to divide them up yourself. Baltic birch?
Thanks! But the demo won't be till the 21st. They'll be the "Only of show" that date, though, as it's a Bring Your Favorite Music meeting, I'm just bringing them to be the system to play on. (My listening area isn't adequate for groups of listeners).
Ah, my mistake, I thought it'd be this one:
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I have 4 large diffusers in there, buy that doesn't give more seats tho or move the 4 I have further from the furnace down there 🙂
I was thinking of the meeting room. Maybe a good spot for a rigid foam version, for EZ portability.
Ah, sorry, I misunderstood. Yeah, some diffusers might help in there. Do you have some foam ones made already? I have some ~6ft tall wooden ones made, but they wouldn't be too fun to carry up from the basement.
There are barrels sitting around in the meeting room and nicknacks sitting on a shelf that help some. There are big windows though, and some large expanses of paneling (though mostly pretty high up, would be hard to get something in front of). A surprisingly good room for what it is, though. And the hard walls help to give speakers with directivity an advantage over ones that don't have any. 🙂
edit: Hi Fred -- just figured out who you were, not too quick sometimes. So you've been in the room.
There are barrels sitting around in the meeting room and nicknacks sitting on a shelf that help some. There are big windows though, and some large expanses of paneling (though mostly pretty high up, would be hard to get something in front of). A surprisingly good room for what it is, though. And the hard walls help to give speakers with directivity an advantage over ones that don't have any. 🙂
edit: Hi Fred -- just figured out who you were, not too quick sometimes. So you've been in the room.
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