Incredible! I love the sound of my cobbled-together, cheap plywood, full range DIY open baffles, I can only imagine how these perform. So beautiful too.
Very good presentation! Thanks. If you are using LSPcad, I have found the simulations very helpful to position drivers and size the baffle. And I also found the combination of several different bass drivers can mitigate the uneven response and cancellation that occurs with open baffles. One issue that arises is too much output at the 100-200hz range, and then the bass output falls off below 40-50hz. There are ways to mitigate that effect as well.
A pair of Hypex FA253 plate amps with the internal digital crossovers would really transform these into accurate speakers. You could equalize the low bass, fix the open baffle upper bass bump and dip and use proper high order crossovers to avoid vertical off axis response anomalies.
I'd use a single-ended tube amp with these. If a speaker can "wake up" with only the first watt they' will sound more detailed than any low sensitivity system hooked to 100 watts.
Development is still ongoing but in its current form its flat from 150Hz to 5kHz, however I will crossing much lower than that at around 600Hz to the ES-450 above it. I can send you preliminary test data if you email me. joseph_crowe@josephcrowe.com
Gorgeous speaker! and end result. Open baffle speakers are in my future... Having owned Maggies and Quad ESLs for 40 years, along with a mix of cone speakers. I do love open dipole sound, with (line-source) propagation in the room. Designing and building high power (mostly) MOS-FET, with a few ICE and Hypex amps in the works... power is not / never an issue... I want efficiency and sensible loading to better mate with my OTL amps (sitting idle, so much of the time). With a few large listening spaces, these speakers would work very well. I am shocked by *how affordable these speakers (actually) are* Hmmmm???
I'm a big friend of 2 1/2 way constructions, and you created a very nice one as it seems! Wonder if using two more wideband 12" with higher Q and 1. Order instead of 15" 4. order would bring further benefits in step response, or is my guessing just a theoretical one?
A really nice looking OB project. However an only horn I can look at naked is Altec 3x5 ;) This could be an option to offer some “dust cover” (from edge to edge) for the horn. PS For some reason I find your horns look like Giger’s sculptures. ))
Hi Joseph Excellent design …. A very big thank you for sharing it. Fairly sure some others have done hybrid OB-horns before - but your approach is the best I’ve seen The larger rear cover for the compression driver, lowering Fs by that much ~ 35%(!) EXCELLENT Were you able to estimate the size of the drop in Fs in advance of making it, based on what factor/s? Cheers
Curious how you got around the Open Baffle Peaking issues with only a 1st order crossover? Did you actually measure the final response? May have at least partially found the answer in your Bass cabinet video. I guess by rolling off the upper end of the 15" driver, you bring down the Peaking?
Hi 👋, They look very nicely made, it’s a shame that you didn’t pay some actual music through them, from classical Toccata in D Minor, Led , Z , Kashmir , Nordic & Viking folk, and war music, there is not many speakers 🔊 that can perform well to this type of music, especially when it comes to organ music, D minor Toccata, I built my transmission line loudspeaker cabinets around 40 years ago, and I just recently replaced the drivers, with SEAS 8” subwoofer, and 3” Tweeters, the line is around 14 Ft and fire out the bottom, And they stand approximately 5 1/2 feet in height, And I’ve been told they sound amazing, Very impressed with your cabinet work, open baffle , speakers, please share some music, Phil from the moulin France
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Incredible! I love the sound of my cobbled-together, cheap plywood, full range DIY open baffles, I can only imagine how these perform. So beautiful too.
Thank you!
Humbling work sir. I am in awe, and inspired. ❤
Gotta be the most elegant open baffles on the market.
Very nice. World class. Good show. Well done. Pop the champagne!
Impressve quality and great design!!
Beautyful Baffle, exzellent work.👍👍👍
Gorgeous looking design. I'd love to hear them...
Very good presentation! Thanks. If you are using LSPcad, I have found the simulations very helpful to position drivers and size the baffle. And I also found the combination of several different bass drivers can mitigate the uneven response and cancellation that occurs with open baffles. One issue that arises is too much output at the 100-200hz range, and then the bass output falls off below 40-50hz. There are ways to mitigate that effect as well.
A pair of Hypex FA253 plate amps with the internal digital crossovers would really transform these into accurate speakers. You could equalize the low bass, fix the open baffle upper bass bump and dip and use proper high order crossovers to avoid vertical off axis response anomalies.
And adjust for the inevitable differences in sensitivity of the drivers once their responses are flattened
I'd use a single-ended tube amp with these. If a speaker can "wake up" with only the first watt they' will sound more detailed than any low sensitivity system hooked to 100 watts.
beautiful work. they look amazing.
Can I ask what the sensitivity measurement is on these babies? I didn't see that on the product page.
Development is still ongoing but in its current form its flat from 150Hz to 5kHz, however I will crossing much lower than that at around 600Hz to the ES-450 above it. I can send you preliminary test data if you email me. joseph_crowe@josephcrowe.com
Looks nice!
I'd be interested in plans.
Gorgeous speaker! and end result. Open baffle speakers are in my future... Having owned Maggies and Quad ESLs for 40 years, along with a mix of cone speakers. I do love open dipole sound, with (line-source) propagation in the room. Designing and building high power (mostly) MOS-FET, with a few ICE and Hypex amps in the works... power is not / never an issue... I want efficiency and sensible loading to better mate with my OTL amps (sitting idle, so much of the time). With a few large listening spaces, these speakers would work very well.
I am shocked by *how affordable these speakers (actually) are* Hmmmm???
Great job!!!
I'm a big friend of 2 1/2 way constructions, and you created a very nice one as it seems!
Wonder if using two more wideband 12" with higher Q and 1. Order instead of 15" 4. order would bring further benefits in step response, or is my guessing just a theoretical one?
I would like to buy the plans for No.1695
Sorry, this is part of my finished products only.
Hi Joseph I would appreciate it if you could let me know the model number of the 10 inch scanspeak. Could it be 21W/8555-10 Thanks
It’s pretty easy to find online. I don’t offer this as DIY, sorry.
That into is like watching "how it's made" 😂
A really nice looking OB project. However an only horn I can look at naked is Altec 3x5 ;) This could be an option to offer some “dust cover” (from edge to edge) for the horn.
PS For some reason I find your horns look like Giger’s sculptures. ))
Hi Joseph
Excellent design …. A very big thank you for sharing it.
Fairly sure some others have done hybrid OB-horns before - but your approach is the best I’ve seen
The larger rear cover for the compression driver, lowering Fs by that much ~ 35%(!) EXCELLENT
Were you able to estimate the size of the drop in Fs in advance of making it, based on what factor/s?
Cheers
Curious how you got around the Open Baffle Peaking issues with only a 1st order crossover? Did you actually measure the final response? May have at least partially found the answer in your Bass cabinet video. I guess by rolling off the upper end of the 15" driver, you bring down the Peaking?
Troy which woofer u would recommend since Scanspeak not avaibale in my country anything in faital peerless
What about Seas?
I would love to know why 2.5way is it because he already had those drivers? (that 10")?or is it truly better than a 3way?
it's because the 10" also contributes to the lowest frequencies - he mentioned that. Then, he can no longer claim it to be a 3 way.
please test the BMS 1” 5530ND
Hi 👋, They look very nicely made, it’s a shame that you didn’t pay some actual music through them, from classical Toccata in D Minor, Led , Z , Kashmir , Nordic & Viking folk, and war music, there is not many speakers 🔊 that can perform well to this type of music, especially when it comes to organ music, D minor Toccata, I built my transmission line loudspeaker cabinets around 40 years ago, and I just recently replaced the drivers, with SEAS 8” subwoofer, and 3” Tweeters, the line is around 14 Ft and fire out the bottom, And they stand approximately 5 1/2 feet in height, And I’ve been told they sound amazing,
Very impressed with your cabinet work, open baffle , speakers, please share some music, Phil from the moulin France
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