This bigger H1-9040P 1" horn has better polars than the H1SC-9040. Raw frequency response with driver below:
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Klipsch and OJAS 2nd collaboration
- Thread starter soundbound
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This bigger H1-9040P 1" horn has better polars than the H1SC-9040. Raw frequency response with driver below:
Gigantic
A big, big love
I wish I had better documentation, I was working on this with Boxler, just after my involuntary retirement January before last and was becoming increasingly ill, although I wasn't fully aware of the scope at the time. My notes were negligible and I kept thinking I'd remember, but each morning, I had to reengineer what I'd done the previous day, just to figure out where I was starting. I think we worked on these and the 3-way "mini" horn for 4-6 weeks; it should have only taken a single week. I was definitely not in a good place.
I never had any luck with the D250.
I may pull them back out and test them again. I don't recall mine making it to 4k.
Gigantic
A big, big love
regrettably, I don't have my measurements or notes handy, they're buried in a text chain with Boxler that goes way back, or on a hard drive that's not connected to anything. I recently ditched the cloud and consolidated files from 5 laptops and recycled several, but I've been lagging on setting up my NAS. I got halfway there by setting up a Plex server,, but I lost interest after that, mainly due to image files. I got things catalogued from 2010-2020, but during covid, the amount of photos, memes and assorted files exploded exponentially and I burned out. I'll be spending the next 5 weeks on my ass, so I'll get back to it eventually.
adding my memory, we tried a D250 clone but got nowhere- it was way too strong for the frequency band I wanted to hit with the mid horn and rather than raise the crossover to 9k for the tweeter, which was where that diver wanted to cross, I returned it and used the JBL. I believe we used some sort of notch filter to tame a hump around 2500Hz and a falling response higher up. at any rate, we did make it work after some fettling. I think I mentioned elsewhere that if I had to do it over again, id use a Celestion 9040P and make it a 2-way, crossed at 1200Hz with a B&C DE10 compression driver. We tried it with a larger Goldwood horn and it worked rather well.
adding my memory, we tried a D250 clone but got nowhere- it was way too strong for the frequency band I wanted to hit with the mid horn and rather than raise the crossover to 9k for the tweeter, which was where that diver wanted to cross, I returned it and used the JBL. I believe we used some sort of notch filter to tame a hump around 2500Hz and a falling response higher up. at any rate, we did make it work after some fettling. I think I mentioned elsewhere that if I had to do it over again, id use a Celestion 9040P and make it a 2-way, crossed at 1200Hz with a B&C DE10 compression driver. We tried it with a larger Goldwood horn and it worked rather well.
That makes sense. I tried the JBL when it was still Selenium D250x and I think I still have the PRV-Audio D250ph. It would definitely benefit from a notch filter to make is useable.
I have never used a DE-10 to 1200Hz though seems perfectly capable.
This is a JBL D-250X (Blue) and K-55V (Orange, push pin) in a ported Heresy. No changes except the driver. ALK Universal crossover (my design).
One channel has a JBL, the other a K-55V:
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Gigantic
A big, big love
I like the D250 a lot in my 3-way bookshelves. Regrettably, I lost pretty much every photo I've taken in the past 20 years when my partner tripped on a cable and yeeted the hard drive I'd transferred everything to, to the floor a few weeks ago. All of my speaker measurements were on that drive as well. I might be able to find some screenshots if I parsed the conversations with Boxler from February of last year, but that's a lot of work. At any rate, it's a dang good driver.
