Part of the 'barrier to entry' with the Unity horns is that you have to be fairly adept at woodworking, 3d printing, or both. Until Parts Express or diysoundgroup starts selling a Unity horn, that will be the case. (The patent is expired, so there's nothing stopping them from selling one, just as they did with the AMT ribbons when THAT patent expired.)
In the meantime, it might be worthwhile to come up with a design that could be mated to a 2" horn.
View attachment 675662
For instance, this ZXPC horn is big enough to control directivity down to 700Hz, and it will load down even further. One could 3D print the first 4" or so, and then mate it to this waveguide. Basically the first 4" of the horn would be the "Unity" part and the rest would be a plain ol' waveguide.
This would simplify things for a DIYer quite a bit.
Down to 700hz? I doubt that...unless its way bigger than what I think it is.
That looks like the ES horn from Joseph Crowe Audio Products I 3D printed the ES-800 and it is great.
Yes it is the es600 Horn 🙂 Had a local carpenter cnc it. Cant wait to pick it up.
Down to 700hz? I doubt that...unless its way bigger than what I think it is.
We will see.
Will have a minidsp with DIRAC so i can "force" it down to 500hz.
If the sound sucks I can always tweak to have a higher crossover point 🙂
I'm just talking about pattern control down to 700hz...pattern control is no different than directivity from an dynamic radiator..if the wave length is 19"....a horn is going to loose directivity at 19"...if that were its size.
Last edited:
It is a similar size to the JBL2380 - but that one has a diffraction slot: https://jblpro.com/en/site_elements/2380a-data-sheet
Did anyone mention the 2386 yet? https://jblpro.com/en-US/product_documents/2386-pdf
Lol i'm super late....nice horn hornwonnabe...I think you'll be able to cross where you want to with your horn depend on where the cutoff is for the horn....if the cutoff is 600hz...then I wouldn't suggest going lower than 600hz.
Lol i'm super late....nice horn hornwonnabe...I think you'll be able to cross where you want to with your horn depend on where the cutoff is for the horn....if the cutoff is 600hz...then I wouldn't suggest going lower than 600hz.
Last edited:
Yes, that one is 40x20 and too small for keeping the directivity control low. My 50x30 AMT1 Synergy horn will be huge, somewhere around 75 cm wide I expect. A bit out of topic - but I think a wide coverage horn can be relatively small. The ES-600 is not exactly small, but would be still acceptable for me.
ES-600 Bi-Radial Horn 3D CAD Files – Joseph Crowe 16.5" x 8" according to the link. I have mistaken it for the larger ES-290 (ES-290 Biradial Horn – Joseph Crowe), the ES-600 is not that big.
That looks like the ES horn from Joseph Crowe Audio Products I 3D printed the ES-800 and it is great.
Did you follow the recommended crossover point?
I just put on a DE500 and did some quick listen and measurements with an old Peavey woofer. I used Driverack PA for the crossover and EQ, but I do not remember where the crossover point ended. I think somewhere between 800 and 1200 Hz, most probably 950 Hz.
Any recommendation if I should put a protection circuit / cap from my amp to the compression driver to protect it whne turning off a tube amplifier?
Plan to cross at 600hz what value cap should i place to cut it off at 350hz/400hz?
Plan to cross at 600hz what value cap should i place to cut it off at 350hz/400hz?
Tube amplifier will never have DC at the output unless the transformer fails. And that is not very likely. I would not use it.
Here’s an LTH142 fitted with an SB65WBAC25-4 driver. It’s about -3dB at 500Hz.
Pretty compact as I was making a “Bookshelf horn” with it. More info here:
A Bookshelf Multi-Way Point-Source Horn
Here it is crossed with two 8in woofers in a point source horn:
The Faital Pro LTH142 is 350mm x 240mm and is probably one of the most compact horns that will reach 500Hz when used with the SB65WBAC25-4 driver.
https://www.parts-express.com/pedocs/specs/294-1042-faitalpro-lth142-4-bolt-specifications.pdf

Pretty compact as I was making a “Bookshelf horn” with it. More info here:
A Bookshelf Multi-Way Point-Source Horn

Here it is crossed with two 8in woofers in a point source horn:


The Faital Pro LTH142 is 350mm x 240mm and is probably one of the most compact horns that will reach 500Hz when used with the SB65WBAC25-4 driver.
https://www.parts-express.com/pedocs/specs/294-1042-faitalpro-lth142-4-bolt-specifications.pdf
Last edited:
Dear hornwannabe,
Could you please clarify the following:
Yes it is the es600 Horn 🙂 Had a local carpenter cnc it. Cant wait to pick it up.
The ES-600 seems to have a 1.4" throat from the following datasheet:
ES-600 Bi-Radial Wood Horn – Joseph Crowe
However, the DE99 seems to have a 2" exit according to PAudio:
https://paudio.com.mx/files/P.-Audio.pdf
So my question is about how you managed to mate them together with these differing dimensions? Or is the DE99 really a 1.5" exit snoutless version (copy of JBL 2447) ? If yes then it is definitely interesting.
Regards.
Could you please clarify the following:
Yes it is the es600 Horn 🙂 Had a local carpenter cnc it. Cant wait to pick it up.
The ES-600 seems to have a 1.4" throat from the following datasheet:
ES-600 Bi-Radial Wood Horn – Joseph Crowe
However, the DE99 seems to have a 2" exit according to PAudio:
https://paudio.com.mx/files/P.-Audio.pdf
So my question is about how you managed to mate them together with these differing dimensions? Or is the DE99 really a 1.5" exit snoutless version (copy of JBL 2447) ? If yes then it is definitely interesting.
Regards.
Last edited:
K510 Build
Since there is a lot of discussion about the K510 on this thread I thought I’d post my almost 2 year build that’s finally nearing completion. This is a K510 on top of a separate sealed bass bin with 2 12 Eminence Kappa Neos. Active crossovers with FIR filters built in rePhase. Originally built in May ‘19 and unfinished until I painted them in November. Only thing left is grills based on Fender Tweed fabric.
Final tuning is awaiting an extra IcePower 1000asp module which us all I’m short for having 4 amp channels for the bass bin and moving to a 2.5 way crossover. DSP is custom using the Reaper DAW and a Motu 8 channel audio interface. Started with a miniDSP 2x8 that I found too noisy. Filters are based on the recommended DSP settings for the KP 904HF, which is the pro bundle I bought from Klipsch containing the horn along with the k691(B&C de750) CD and metal stands.
When I finish these I put together a build thread.
Since there is a lot of discussion about the K510 on this thread I thought I’d post my almost 2 year build that’s finally nearing completion. This is a K510 on top of a separate sealed bass bin with 2 12 Eminence Kappa Neos. Active crossovers with FIR filters built in rePhase. Originally built in May ‘19 and unfinished until I painted them in November. Only thing left is grills based on Fender Tweed fabric.
Final tuning is awaiting an extra IcePower 1000asp module which us all I’m short for having 4 amp channels for the bass bin and moving to a 2.5 way crossover. DSP is custom using the Reaper DAW and a Motu 8 channel audio interface. Started with a miniDSP 2x8 that I found too noisy. Filters are based on the recommended DSP settings for the KP 904HF, which is the pro bundle I bought from Klipsch containing the horn along with the k691(B&C de750) CD and metal stands.
When I finish these I put together a build thread.
Attachments
Dear hornwannabe,
Could you please share a little more information on the PA-DE99 (pancake) driver that you have?
What is the throat like? Is there a distance between the phase plug and the driver exit (like in 2447)? The dimensions for the exit i.e. 1.5" or 2"? It would be really nice if you could you please post some closeup photos of the PA-DE99 throat and phase plug. I'm asking this because there is not much information available on this affordable driver.
Thanks in advance.
Could you please share a little more information on the PA-DE99 (pancake) driver that you have?
What is the throat like? Is there a distance between the phase plug and the driver exit (like in 2447)? The dimensions for the exit i.e. 1.5" or 2"? It would be really nice if you could you please post some closeup photos of the PA-DE99 throat and phase plug. I'm asking this because there is not much information available on this affordable driver.
Thanks in advance.
Last edited:
Dear hornwannabe,
Could you please clarify the following:
Yes it is the es600 Horn 🙂 Had a local carpenter cnc it. Cant wait to pick it up.
The ES-600 seems to have a 1.4" throat from the following datasheet:
ES-600 Bi-Radial Wood Horn – Joseph Crowe
However, the DE99 seems to have a 2" exit according to PAudio:
https://paudio.com.mx/files/P.-Audio.pdf
So my question is about how you managed to mate them together with these differing dimensions? Or is the DE99 really a 1.5" exit snoutless version (copy of JBL 2447) ? If yes then it is definitely interesting.
Regards.
Here you go.Dear hornwannabe,
Could you please share a little more information on the PA-DE99 (pancake) driver that you have?
What is the throat like? Is there a distance between the phase plug and the driver exit (like in 2447)? The dimensions for the exit i.e. 1.5" or 2"? It would be really nice if you could you please post some closeup photos of the PA-DE99 throat and phase plug. I'm asking this because there is not much information available on this affordable driver.
Thanks in advance.
Used this adapter to mate the CD to the Horn
https://www.parts-express.com/Eminence-HA14-2-1-1-4-Aluminum-Horn-Adapter-290-5626
Attachments
Just an update on this, finally built the speakers.
Arbitrarily chasing 500hz xover is not a good idea hahahaha.
It is possible but room, horn, and woofer integration coupled with crossover design is more important than an arbitrary crossover point.
Settled on a 900hz - 1200hz xover point and here's a link to a thread clarifying slope choices.
https://www.diyaudio.com/community/...ns-for-600hz-horn-and-jbl-2225h.384433/page-2
Arbitrarily chasing 500hz xover is not a good idea hahahaha.
It is possible but room, horn, and woofer integration coupled with crossover design is more important than an arbitrary crossover point.
Settled on a 900hz - 1200hz xover point and here's a link to a thread clarifying slope choices.
https://www.diyaudio.com/community/...ns-for-600hz-horn-and-jbl-2225h.384433/page-2
- Home
- Loudspeakers
- Multi-Way
- Smallest Footprint Horn and Driver that can reach 500 Hz