Any of you started working on a three-way constant directivity speaker yet?
If so, how large are you willing to make the midhorn to provide CD? How far down in frequency are you trying to achieve CD? You can use corners, allowing the midhorn to be undersized, which is an easy way to get constant directivity all the way down to the Schroeder frequency. But of course that limits placement options.
Anybody here building a three-way?
If so, how large are you willing to make the midhorn to provide CD? How far down in frequency are you trying to achieve CD? You can use corners, allowing the midhorn to be undersized, which is an easy way to get constant directivity all the way down to the Schroeder frequency. But of course that limits placement options.
Anybody here building a three-way?
I'd like to, at some point in the near future. Or, maybe I'm just crazy. I have a few Delta PRO-12A's I scored for cheap a while back ago that I need to either use or sell. I've had thoughts for home theater about a massive OB, or a make do IB using these Eminence drivers with a 1.4" or 2" exit driver crossed high to something small with high efficiency and good dispersion all the way up near 20k with ease of mating the mid horn to the 12" woofer being the goal (not completely sure, but I think I've found that dispersion quickly narrowing around or above 10 KHz is something that bugs me a bit). For the lows, a pair of those "cheap" Pyle 21" woofers per side with a lower order xo around 100-120 Hz. There'd be one below the Delta PRO 12, and another above the rest, on either a huge 4x8' sheet or a few of them together for make do semi-IB. Thing is though, my passive crossover skills are pretty much nil, and this obviously creates a big problem. Active 4-ways in a home theater can get expensive, and the main priority for this system equal to performance is obviously bang for the buck. Not only does it get expensive, but nearly impossible. I don't particularly care for the AD/DA of the Behringer units and such, and a computer crossover would get complicated with very expensive sound card(s) with a ton of outputs. There also doesn't appear to be any options for analog volume control before the amplifiers, at least not with anywhere near the required amount of inputs/outputs. So, that's the main issue for me. Well, that and.. I still don't know what horns to use..
Hulkss's 24" horn/waveguide with a coax compression driver looks really interesting. He's crossing at 400 Hz. The top section is modular so he can compare to his Unities and also compare to a non-coax CD.
http://www.diyaudio.com/forums/showthread.php?t=149085
Is that horn CD? I mean, I'm assuming since the name "waveguide" was chosen, it is constant directivity but I seem to recall that it wasn't.
I looked back at the thread and refreshed my memory that the horn isn't CD. Not that this disqualifies it, in my opinion. Uniformly collapsing directivity is certainly preferable to abrupt changes in directivity. But it is not a constant directivity horn "waveguide".
Today I've posted some measurements of a lowly diffraction horn with and without the HOM-reducing foam. Because a diffraction horn should suffer from HOMs more than a waveguide, it's an interesting read IMHO.
Give it a look:
http://www.diyaudio.com/forums/showthread.php?t=151376
Well, some of augerpro's measurements are up and, so far, I don't think I wasted my 72 bucks for 8 of the 14"x10" QSC PL-000446-GP. I think there's going to be a run on them if augerpro ends up using them in the economy 2-way he's going to design with the Eminence woofer.
http://sites.google.com/site/drivervault/driver-measurements/horns-and-waveguides
dammit you're right:
Thank you for placing your QSC web order #5200. The part PL-000446-GP is currently on back order and the current ETA for this is 6 to 8 weeks. We can place your order and ship out the two items SP-000106-GP and SP-000086-GP to you now and keep the PL-000446-GP on hold till it comes in. Once the PL-000446-GP comes in we will then expedite the shipping to you at no cost. Let me know what you would like to do.
I think it's a modified Tractrix and not an exact Tractrix expansion.
The graphs I remember seeing made it seem like response was pretty flat fairly wide Horizontal and Vertical which is why I called it a CD.
The EV DX38 settings provide a good bit of boost for the higher frequencies when using the K69 driver or the TAD 4002 which I thought was fairly standard CD territory.
But I've never even heard Jubilees so what do I know...
How come I've never heard of these?
An externally hosted image should be here but it was not working when we last tested it.
Whoah, that's a big horn
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
The horizontal here:
http://www.jblpro.com/pub/obsolete/23525354.pdf
Horizontal and vertical here:
http://www.jblpro.com/pub/obsolete/2344A.pdf
In product here:
http://www.jblpro.com/catalog/support/getfile.aspx?doctype=3&docid=1078
Dunno. I'd guess they're real.
I found them in one of the Jubilee threads on the Klipsch forum, as I recall, or Coytee snagged them and posted them somewhere else.
Seems they optimized the wrong axis....
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I guess what confuses me is why the JBL horn in the first link only plots out to 40 degrees off axis.
If that's the case then is the K-402 really that bad?
Patrick,
The Jubilee was Paul W Klipsch's final horn loaded bass bin design.
He was trying to get a bass bin that could be crossed over high enough to be able to work as a two way with the right horn on top.
The Jub bass bin is reported to have 1/3 the distortion of the Khorn bass bin.
The K-402 horn on top was designed by Roy Delgado at Klipsch.
The Jubilee is officially sold only as a 3 way theater speaker but it is possible to contact Roy and get them custom ordered as a two way.
Roy has provided the EV DX38 settings, schematics for a passive crossover and even additional settings for using a TAD 4002 driver instead of the standard K-69.
I plan on building a pair of Jub bass bins as soon as I've got the money for the drivers.
I'll probably go with a homebrew horn on top.
For now I'm working on a pair of homebuilt MWM singles.
Peace,
Josh
If that's the case then is the K-402 really that bad?
Patrick,
The Jubilee was Paul W Klipsch's final horn loaded bass bin design.
He was trying to get a bass bin that could be crossed over high enough to be able to work as a two way with the right horn on top.
The Jub bass bin is reported to have 1/3 the distortion of the Khorn bass bin.
The K-402 horn on top was designed by Roy Delgado at Klipsch.
The Jubilee is officially sold only as a 3 way theater speaker but it is possible to contact Roy and get them custom ordered as a two way.
Roy has provided the EV DX38 settings, schematics for a passive crossover and even additional settings for using a TAD 4002 driver instead of the standard K-69.
I plan on building a pair of Jub bass bins as soon as I've got the money for the drivers.
I'll probably go with a homebrew horn on top.
For now I'm working on a pair of homebuilt MWM singles.
Peace,
Josh
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