I am about 10 ft away from my forte ones, and I think it is the best smoothest and most coherent I've heard them. Also my update on the new GR research crossovers that I built for them. I am really impressed with the improvement in the depth and width of the sound stage. They are more coherent through the mid-range and high end and the bass is more solid and importantly allows you to pull the speakers out from the wall without the bass dropping out.
I also visited the store you mention in LA. But I liked the Devore so much the I built one myself. At the time I visited the store they did not have the Ojas but I would like to built one myself. Looking forward to your challenges and final results. I also have a "hot rodded" Will Vincent ST70. Love your videos.
I have had similar homemade speakers for some time now. The cabinets are originally from a console produced by a famous cabinet maker and were loaded with Allied 15" three ways. Sold those for a pretty penny and went back in with Altec 416 drivers. Put an 811 horn on top with some 808B compression drivers. Found out that speaker placement and toe in were very important for sound stage and imagining. Rebuilt my crossovers but eventually went to bi-amp. I agree with you on the Dynaco amp and Heresy speakers. Great combo.
Proper, and adequate, acoustic treatment can eliminate many of those "room" and "positioning" issues. The reduced dispersion from a horn helps increase the ratio of direct/reflected sound.
I love your idea to diy a pair of these, and I may follow along and build my own if you publish your parts list in advance. I like the idea of the attenuator on the top end and separate box for bass. It should possible to swap a Heresy bass bin for something bigger like the Cornwall? I'm also running a pair of Heresy's (HIP version) with a Dynaco St-70.
Last year I built a set up similar to these. Altec 808 in Altec 311-90 horns Altec 414 drivers Fostex T90 tweeter Ported birch ply braced cabinet(with wool damping), a little more volume than Klipsch/Ojas. Custom crossover. The whole thing was put together for just over $2.5K. Yes there were no labour costs, but I would say that the quality is superior to these at both a component and sound reproduction level. I would imagine that the limited 100 set release will be extended to recoup costs. Ojas is on a bit of a cult run at the moment with younger people being introduced to the hifi world through his kit speakers and audio installations.
I agree with your observations about room size. My mostly diy speakers have gotten smaller and smaller over the years and the sound has improved. I always wanted a pair of Klipsch. I think the Heresy could be an option. Currently I am using a single 15 inch wideband speaker in an open baffle, plus sub. No need to worry about mids or highs coming from different speakers. The sound is seemless and holographic and great on Jazz. But I do want a horn again in my room, and I always wanted to build something like the ojas. But which horn and compression driver to use?
Dr D new phrase 4 U Acoustic Wave Front projected into the listening plane. Technically is what you're describing. Also I use my own active DIY room treatment.
Have been following you for over a year. I have heresy III with sub woofers and love them. Originally had Primaluna integrated amp but sold that to age Kenny's PAS preamp and ST-35. I've been thinking of getting a restored Scott 222 integrated amp. Have you ever looked at vintage Fisher or Scott powering your Klipsch speakers?
Hello, I really love how honest you are in the listening experiences you have. I have been a Klipsch man my whole life starting in 1988 with the Forte and love horns. A few years ago I brought the Forte IVs into my system, they sound to me better then the older Fortes. Life was going along great except for the Primaluna gear giving me problems…then one off my Klipsch Home theater main speakers died so I was on the hunt for new speakers….I put the Fortes in my home theater and took a chance on the Volti Audio Razz speakers…talk about the upper midrange …the two inch horn in the Razz makes the music so clear compared to the Fortes…it’s night and day difference…the Fortes sound like the music can’t get out of the box …have you heard the Volti Audio speakers?
@@Charles12509 Thanks for sharing. Yes I’m very familiar with Volti Audio in fact the Vittora has been on my radar for a different location. I have been looking at them for quite a while now. It’s so interesting that you mentioned the Razz. Bob and I were both looking at that speaker but what happened was that it’s difficult to get solid context from reviews and this is what caused confusion for Bob and I. Andrew Robinson and his girlfriend didn’t seem to think that the jump from the Forte to the Cornwall was as much as they would have thought. Then Steve Guttenberg the audiopheliac said the Cornwall was better than the Razz. It’s confusing when you hear reviews like this. Honestly the Ojas sounded amazing because the upper midrange is so large, open and airy. I would LOVE to hear a Razz but never have and believe it or not, what you say makes more sense to me than trying to interpret these other reviews. The other issue and this a huge one. I mainly play jazz. Many reviewers of speakers don’t appreciate this obsession with open, airy sounding horns. These other reviewers play all sorts of esoteric genres of music and that’s perfectly fine. It’s just that in order for me to understand where they’re coming from, the music is a major factor.
@ I would get a hold of Greg the owner of Volti there may be someone close to you with one of his speakers who is willing for you to come over for a listen like Fido did…
I think it's really interesting how you were talking about about the balance of your speakers in the room. And if you have to pump up the volume to get the bass o engage or to get the high end open up. I'm a lot like you where I listen to a lot of low-level jazz in the evening and I want it to sound full and open at any level. Some speakers especially in an untreated room when you bring the volume up enough to get the base going then your high end gets out of control. Or even vice versa
I've got a set of circa early/mid 1980s Heresys setting on top of cabinets that house a stereo pair of SVS 1000 subs that sound fantastic. The cabinets in which the subs are placed raise the Heresys up to about 18-inches. And it also helps having it all powered by a Fisher 800B. And jazz is my gig too.
You will notice that Devon switched out the the boxes . Baltic Birch instead of MDF ; also the horns cast Aluminum vs. The plastic in the Hersey IV ‘s . The original Heresy 1’s are all Birchwood ply ; the earlier models used cast metal horns with Alnico magnets ! Love my 1976 Heresy 1’s ; a recap and better binding posts and they really sing!
The gear in that dealers room is some of the best ever made the Yoshino E.A.R (Esoteric Audio Research) designed by designer engineer god Tim De Paravinci. From South Africa he is on par with Nelsen Pass,Bob Carver,Henry Kloss,James B Lansing et al.He designed for many companies at a price point like Adcom but made legendary stuff for companies like Luxman and SAE in 70's.Recently deceased he is a guy whose work is worth looking up.I have his EL34 based 834 integrated amp which was designed and built buy his EAR company in England.That 912 pre in the picture is a SICK end game preamp. Liked the video but wish you had given the dimensions again (I know you have specified it in the past) since the room size was key to the subject at hand.Think you should check out the Herb Reichert recommended Heretiic speakers out of Canada.Based on Altec with modern components they are a coaxial two ways that can run on like 3 watts and were $7K ,$9K and a top model I forget the price of.
Great video. I saw the one hour video John Darko posted with the gentleman from Ojas an interesting guy. I just retired so I am going to start looking into DIY projects myself primarily speakers. Again thank you for your insights. By the way, not to be too personal. It looks like you’re doing very well with your health. If I’m not mistaken, you did or do have some health challenges, like I said, not trying to be personal stay well
@@drde4010 I am happy to hear that you are doing better. Many thanks for the various discussions here. You are a breath of fresh air in the HiFi storm. Best regards...John
On a superficial level if anyone was going to spend that much on speakers you'd imagine they'd want a floor stander not some squarish box on stands that look odd in combination.
For me, part of the decision process on speakers is the room that they are going to. If I had a small room with a big budget, I might consider the OJAS speakers.
Depends on the room and the listener's preference. My 3 way standmounts cost a bit more than those, and they are perfect in my 16x15 room. I feel like I got more than my money's worth. Soundstage is high and pushes to the boundaries of the walls. The 8' center image is spot on and detailed. Bass is tight, clean and bouncy. A larger speaker could become overwhelming. Size is more room dependent than value dependent.
I'm not sure if this was your point or not, but how much would you say one would have to spend on the system you demonstrated to only improve marginally or not at all? Thats what kills me, not to mention that I don't believe Ojas has thought outside the box. I believe Klipsch needed to touch a market they couldn't hit and teamed up with someone who can. I think anyone can build this speaker and tailor it to their room.
Japanese listen to big JBLs in very small rooms. It is more a factor of treatment than size I guess. Big baffles in small room can be excellent at low level, filling the room completely.
@@chengo51 Yes, I’m very fond of the Japanese hifi culture particularly with their vinyl bars and 1930’s Altec horns. I have a video about Altec I’ll be posting with design drawings by a friend who an expert on Altec. I suppose it would depend on what JPL’s we are discussing. I suppose the room size and ability for a large speaker to function also has to do with design. The Altec’s use a very large horn which cover all the upper frequencies including the highest frequencies. In my situation this was not the case. I had two separate horns in my face at ear level. One was a squawker and the other, a horn tweeter. This caused me to hear two different frequency levels with certain music tracks. This wouldn’t happen with Altec horns. Regardless, I think you are correct with regard to certain larger designs.
@@DOr-tq5zp SkyFi Audio has a couple of Ojas reviews. This review is about achieving an Ojas sound signature regarding the upper midrange using an affordable Heresy.
FOR ALL YOU HERESY FOLKS OUT THERE, NOTE THE OJAS STANDS! GET YOUR KLIPSCHES OFF THE FLOOR! I forsee folks down the line making wooden top cover kits for these things giving em more of the home speaker feel. Devons philosophy on bass is what I most identify with, as we know how lovely the OG Altecs sound, they didnt dig very deep. Filling that in with something adequate really makes it all come to life and make sense for me.
@ my new room (building right now) is 12 x 16. What horn speaker or speaker do you recommend? I enjoy listening to singer songwriter below 60db, sometimes some Dave Matthews Band.
Ojas knows how to style things, but he is not a loudspeaker designer (like Jean Hiraga, etc). The horn is great but he didn't design that; it's designed by a horn expert in another state.
@@WoodyONeal I agree it’s marketing too but in fairness to Devon, he had to disassemble a Heresy IV and redesign it plus redesign the crossover, as well as the horn and the driver. Hard to say in my humble opinion.
I don`t use The Forte`s - I have CW - anyway I think the Heresy works better in your room because the Forte needs more distance to the backwall. The CW would work better I think
@@ducmoto1975 Thank you for sharing your thoughts. I know many have thought this, but actually the engineers at Klipsch explained that it’s recommended not to have the Forte more than 13” from the back wall due to phase issues with the bass. This was explained in a recent video by Klipsch which I posted in the Klipsch Community. The other matter was that the problem I had with the Forte was mostly related to the height which placed the squawker and tweeter in too close a proximity to my ear level, relative to my close seating position. The ear level is not an issue in the larger front room where the Forte normally stay.
Devon Turnbull (OJAS) is a huge Japan-o-phile. They don't have the room philosophy that we tend to have and he's been to many collectors there with giant Altecs in small Japanese rooms. When he takes his stuff on tour those listening rooms tend to be big but his listening room in Manhatten really isn't very big and the speakers are massive. It sounds divine there! It's only open Saturdays for a few hours but holy crap if you're in the area look it up. Doing this OJAS speaker DIY will have a few hurdles. The horn is from the Forte 4s but the magnet on the compression driver is larger and unique for this project. They don't sell the compression driver outside of this speaker. I was told they changed the magnet so they could use that speaker to drive both mid and high in the 2-way configuration. Doing his ArtBooks are pretty straightforward. The plans are floating around and all you have to get for drivers is a pair of JBL 322C coax.
@@DBravo29er it's not a Heresy compression driver. It's a K-706 driver, a variation of the K-702 driver out of the Forte 4 with a waveguide designed by OJAS. The woofer is a stock Heresy 4 woofer with a custom crossover. I spoke to Mr. Turnbull directly on this because I couldn't find the K-706 driver anywhere on Klipsch's website and I figured I would try a DIY on this. That's how I discovered what it is and why DIY isn't on the table for an exact replica.
@ Wrong. The K-702 is used in the Heresy IV with the K-704 Tractrix horn. Same driver is also used in the Forte IV & Cornwall IV. However, K forum analysis suggests that the C K-702 is OEM'd for Klipsch by Celestion. Most likely an OEM version of Celestion driver CDX1-1742 or CDX1-1748, but with minor modifications to meet Klipsch’s design requirements. The changes specified likely relate to motor BL or thread pitch for the horn. I know the outfit that designed this horn for Devon. They are in Texas.
@DBravo29er the klipsch website lists the 702 in the forte which is what I said. The ojas website lists the cd as the 706. There is no 706 on the klipsch website so I reached out to Devon because I've met him him before and that's how I found out the particulars. The 706 is unique to this speaker. And I said ojas designed the horn. I didn't say made it.
@@tmdillon1969 It's a Celestion CDX1-1740. Which is literally a K-702/CDX1-1742 with two changes: it uses a bolt up mounting pattern and it has an untreated Ti diaphragm instead of a Polyamide diaphragm.
@@ramongomez6720 Heresy III’s? I have the II’s but just in case you are mixing them, the reason I always gloss over them is because I use them as a consistent frame of reference to gauge against. Feel free if you have any thoughts. Happy to consider. Thank you
It’s a fantastic shop. Beautiful set up. And wonderful people.
I am about 10 ft away from my forte ones, and I think it is the best smoothest and most coherent I've heard them. Also my update on the new GR research crossovers that I built for them. I am really impressed with the improvement in the depth and width of the sound stage. They are more coherent through the mid-range and high end and the bass is more solid and importantly allows you to pull the speakers out from the wall without the bass dropping out.
I also visited the store you mention in LA. But I liked the Devore so much the I built one myself. At the time I visited the store they did not have the Ojas but I would like to built one myself. Looking forward to your challenges and final results. I also have a "hot rodded" Will Vincent ST70. Love your videos.
That’s awesome, building your own is very rewarding and fun I’m sure.
I have had similar homemade speakers for some time now. The cabinets are originally from a console produced by a famous cabinet maker and were loaded with Allied 15" three ways. Sold those for a pretty penny and went back in with Altec 416 drivers. Put an 811 horn on top with some 808B compression drivers. Found out that speaker placement and toe in were very important for sound stage and imagining. Rebuilt my crossovers but eventually went to bi-amp. I agree with you on the Dynaco amp and Heresy speakers. Great combo.
Proper, and adequate, acoustic treatment can eliminate many of those "room" and "positioning" issues. The reduced dispersion from a horn helps increase the ratio of direct/reflected sound.
I love your idea to diy a pair of these, and I may follow along and build my own if you publish your parts list in advance.
I like the idea of the attenuator on the top end and separate box for bass. It should possible to swap a Heresy bass bin for something bigger like the Cornwall?
I'm also running a pair of Heresy's (HIP version) with a Dynaco St-70.
Last year I built a set up similar to these.
Altec 808 in Altec 311-90 horns
Altec 414 drivers
Fostex T90 tweeter
Ported birch ply braced cabinet(with wool damping), a little more volume than Klipsch/Ojas.
Custom crossover.
The whole thing was put together for just over $2.5K. Yes there were no labour costs, but I would say that the quality is superior to these at both a component and sound reproduction level.
I would imagine that the limited 100 set release will be extended to recoup costs. Ojas is on a bit of a cult run at the moment with younger people being introduced to the hifi world through his kit speakers and audio installations.
@@phrayzar You are right about the production run. I’ve read/heard rumblings in the last week or so about that ceiling going away.
What is your tube preamp? Very attractive design.
@@jkjome4095 Aretha by Erhard Audio. Thanks
I agree with your observations about room size. My mostly diy speakers have gotten smaller and smaller over the years and the sound has improved. I always wanted a pair of Klipsch. I think the Heresy could be an option. Currently I am using a single 15 inch wideband speaker in an open baffle, plus sub. No need to worry about mids or highs coming from different speakers. The sound is seemless and holographic and great on Jazz. But I do want a horn again in my room, and I always wanted to build something like the ojas. But which horn and compression driver to use?
This is something my friend Bob and I are still working on. I have a few ideas. In the meantime take a look at this. shinjitsuaudio.com/
Thank you for the feedback. 👍
Dr D new phrase 4 U Acoustic Wave Front projected into the listening plane.
Technically is what you're describing.
Also I use my own active DIY room treatment.
Have been following you for over a year. I have heresy III with sub woofers and love them. Originally had Primaluna integrated amp but sold that to age Kenny's PAS preamp and ST-35. I've been thinking of getting a restored Scott 222 integrated amp. Have you ever looked at vintage Fisher or Scott powering your Klipsch speakers?
I just acquired a refurbished Scott 231 and have it paired with my Cornwall IIs. Loving this chain now.
Hi, thanks for sharing. I have not heard those before but if you do get your hands on them, I hope to hear how your experiences are.
good job beginning to define the importance of room regarding the best speaker for a given context
Hello, I really love how honest you are in the listening experiences you have. I have been a Klipsch man my whole life starting in 1988 with the Forte and love horns. A few years ago I brought the Forte IVs into my system, they sound to me better then the older Fortes. Life was going along great except for the Primaluna gear giving me problems…then one off my Klipsch Home theater main speakers died so I was on the hunt for new speakers….I put the Fortes in my home theater and took a chance on the Volti Audio Razz speakers…talk about the upper midrange …the two inch horn in the Razz makes the music so clear compared to the Fortes…it’s night and day difference…the Fortes sound like the music can’t get out of the box …have you heard the Volti Audio speakers?
@@Charles12509 Thanks for sharing. Yes I’m very familiar with Volti Audio in fact the Vittora has been on my radar for a different location. I have been looking at them for quite a while now. It’s so interesting that you mentioned the Razz. Bob and I were both looking at that speaker but what happened was that it’s difficult to get solid context from reviews and this is what caused confusion for Bob and I. Andrew Robinson and his girlfriend didn’t seem to think that the jump from the Forte to the Cornwall was as much as they would have thought. Then Steve Guttenberg the audiopheliac said the Cornwall was better than the Razz. It’s confusing when you hear reviews like this. Honestly the Ojas sounded amazing because the upper midrange is so large, open and airy. I would LOVE to hear a Razz but never have and believe it or not, what you say makes more sense to me than trying to interpret these other reviews. The other issue and this a huge one. I mainly play jazz. Many reviewers of speakers don’t appreciate this obsession with open, airy sounding horns. These other reviewers play all sorts of esoteric genres of music and that’s perfectly fine. It’s just that in order for me to understand where they’re coming from, the music is a major factor.
@ I would get a hold of Greg the owner of Volti there may be someone close to you with one of his speakers who is willing for you to come over for a listen like Fido did…
I think it's really interesting how you were talking about about the balance of your speakers in the room. And if you have to pump up the volume to get the bass o engage or to get the high end open up. I'm a lot like you where I listen to a lot of low-level jazz in the evening and I want it to sound full and open at any level. Some speakers especially in an untreated room when you bring the volume up enough to get the base going then your high end gets out of control. Or even vice versa
I've got a set of circa early/mid 1980s Heresys setting on top of cabinets that house a stereo pair of SVS 1000 subs that sound fantastic. The cabinets in which the subs are placed raise the Heresys up to about 18-inches. And it also helps having it all powered by a Fisher 800B. And jazz is my gig too.
You will notice that Devon switched out the the boxes . Baltic Birch instead of MDF ; also the horns cast Aluminum vs. The plastic in the Hersey IV ‘s . The original Heresy 1’s are all Birchwood ply ; the earlier models used cast metal horns with Alnico magnets ! Love my 1976 Heresy 1’s ; a recap and better binding posts and they really sing!
The gear in that dealers room is some of the best ever made the Yoshino E.A.R (Esoteric Audio Research) designed by designer engineer god Tim De Paravinci. From South Africa he is on par with Nelsen Pass,Bob Carver,Henry Kloss,James B Lansing et al.He designed for many companies at a price point like Adcom but made legendary stuff for companies like Luxman and SAE in 70's.Recently deceased he is a guy whose work is worth looking up.I have his EL34 based 834 integrated amp which was designed and built buy his EAR company in England.That 912 pre in the picture is a SICK end game preamp. Liked the video but wish you had given the dimensions again (I know you have specified it in the past) since the room size was key to the subject at hand.Think you should check out the Herb Reichert recommended Heretiic speakers out of Canada.Based on Altec with modern components they are a coaxial two ways that can run on like 3 watts and were $7K ,$9K and a top model I forget the price of.
Isn't the company-that made the Heretic now out of business?
Why does he use the name Yoshino? always wondered
I agree with you,…the Room is the most important thing. The most people have too big Speakers in too Small Rooms..
Great video. I saw the one hour video John Darko posted with the gentleman from Ojas an interesting guy. I just retired so I am going to start looking into DIY projects myself primarily speakers. Again thank you for your insights. By the way, not to be too personal. It looks like you’re doing very well with your health. If I’m not mistaken, you did or do have some health challenges, like I said, not trying to be personal stay well
@@vincedebart I’m doing better thanks very much for asking. I’ll have to post an update about that. Thanks for the feedback and keep in touch. 👍
@@drde4010 I am happy to hear that you are doing better. Many thanks for the various discussions here. You are a breath of fresh air in the HiFi storm. Best regards...John
On a superficial level if anyone was going to spend that much on speakers you'd imagine they'd want a floor stander not some squarish box on stands that look odd in combination.
@@ConorHanley Yea I was thinking that too.
For me, part of the decision process on speakers is the room that they are going to. If I had a small room with a big budget, I might consider the OJAS speakers.
Devon Ojas' aesthetic is about as appealing to me as stale candy.
Depends on the room and the listener's preference. My 3 way standmounts cost a bit more than those, and they are perfect in my 16x15 room. I feel like I got more than my money's worth. Soundstage is high and pushes to the boundaries of the walls. The 8' center image is spot on and detailed. Bass is tight, clean and bouncy. A larger speaker could become overwhelming. Size is more room dependent than value dependent.
How did you hook up the subwoofer to the st70 etc?
@@daviewavie112 it’s all discussed here. th-cam.com/video/imM84lQw6Ng/w-d-xo.htmlsi=_lM4Ckd0fiNb5Y_b
I'm not sure if this was your point or not, but how much would you say one would have to spend on the system you demonstrated to only improve marginally or not at all? Thats what kills me, not to mention that I don't believe Ojas has thought outside the box. I believe Klipsch needed to touch a market they couldn't hit and teamed up with someone who can. I think anyone can build this speaker and tailor it to their room.
Looks like Klipsch Heresy speakers with JBL 375 on top .. which is what I run these days with Alan Eaton Amp :)
Japanese listen to big JBLs in very small rooms. It is more a factor of treatment than size I guess. Big baffles in small room can be excellent at low level, filling the room completely.
@@chengo51 Yes, I’m very fond of the Japanese hifi culture particularly with their vinyl bars and 1930’s Altec horns. I have a video about Altec I’ll be posting with design drawings by a friend who an expert on Altec. I suppose it would depend on what JPL’s we are discussing. I suppose the room size and ability for a large speaker to function also has to do with design. The Altec’s use a very large horn which cover all the upper frequencies including the highest frequencies. In my situation this was not the case. I had two separate horns in my face at ear level. One was a squawker and the other, a horn tweeter. This caused me to hear two different frequency levels with certain music tracks. This wouldn’t happen with Altec horns. Regardless, I think you are correct with regard to certain larger designs.
I wish next time you share more about OJAS speakers than your Heresy’s ones.
@@DOr-tq5zp SkyFi Audio has a couple of Ojas reviews. This review is about achieving an Ojas sound signature regarding the upper midrange using an affordable Heresy.
FOR ALL YOU HERESY FOLKS OUT THERE, NOTE THE OJAS STANDS! GET YOUR KLIPSCHES OFF THE FLOOR!
I forsee folks down the line making wooden top cover kits for these things giving em more of the home speaker feel. Devons philosophy on bass is what I most identify with, as we know how lovely the OG Altecs sound, they didnt dig very deep. Filling that in with something adequate really makes it all come to life and make sense for me.
What is the size of your room?
About 10x13
@ my new room (building right now) is 12 x 16. What horn speaker or speaker do you recommend? I enjoy listening to singer songwriter below 60db, sometimes some Dave Matthews Band.
Ojas knows how to style things, but he is not a loudspeaker designer (like Jean Hiraga, etc). The horn is great but he didn't design that; it's designed by a horn expert in another state.
R&D?
No.
100% marketing.
@@WoodyONeal I agree it’s marketing too but in fairness to Devon, he had to disassemble a Heresy IV and redesign it plus redesign the crossover, as well as the horn and the driver. Hard to say in my humble opinion.
I don`t use The Forte`s - I have CW - anyway I think the Heresy works better in your room because the Forte needs more distance to the backwall. The CW would work better I think
@@ducmoto1975 Thank you for sharing your thoughts. I know many have thought this, but actually the engineers at Klipsch explained that it’s recommended not to have the Forte more than 13” from the back wall due to phase issues with the bass. This was explained in a recent video by Klipsch which I posted in the Klipsch Community. The other matter was that the problem I had with the Forte was mostly related to the height which placed the squawker and tweeter in too close a proximity to my ear level, relative to my close seating position. The ear level is not an issue in the larger front room where the Forte normally stay.
Devon Turnbull (OJAS) is a huge Japan-o-phile. They don't have the room philosophy that we tend to have and he's been to many collectors there with giant Altecs in small Japanese rooms. When he takes his stuff on tour those listening rooms tend to be big but his listening room in Manhatten really isn't very big and the speakers are massive. It sounds divine there! It's only open Saturdays for a few hours but holy crap if you're in the area look it up. Doing this OJAS speaker DIY will have a few hurdles. The horn is from the Forte 4s but the magnet on the compression driver is larger and unique for this project. They don't sell the compression driver outside of this speaker. I was told they changed the magnet so they could use that speaker to drive both mid and high in the 2-way configuration. Doing his ArtBooks are pretty straightforward. The plans are floating around and all you have to get for drivers is a pair of JBL 322C coax.
It's actually a standard Heresy CD and motor. The horn is bespoke and designed by a horn expert in another state.
@@DBravo29er it's not a Heresy compression driver. It's a K-706 driver, a variation of the K-702 driver out of the Forte 4 with a waveguide designed by OJAS. The woofer is a stock Heresy 4 woofer with a custom crossover. I spoke to Mr. Turnbull directly on this because I couldn't find the K-706 driver anywhere on Klipsch's website and I figured I would try a DIY on this. That's how I discovered what it is and why DIY isn't on the table for an exact replica.
@ Wrong. The K-702 is used in the Heresy IV with the K-704 Tractrix horn. Same driver is also used in the Forte IV & Cornwall IV.
However, K forum analysis suggests that the C K-702 is OEM'd for Klipsch by Celestion. Most likely an OEM version of Celestion driver CDX1-1742 or CDX1-1748, but with minor modifications to meet Klipsch’s design requirements. The changes specified likely relate to motor BL or thread pitch for the horn. I know the outfit that designed this horn for Devon. They are in Texas.
@DBravo29er the klipsch website lists the 702 in the forte which is what I said. The ojas website lists the cd as the 706. There is no 706 on the klipsch website so I reached out to Devon because I've met him him before and that's how I found out the particulars. The 706 is unique to this speaker. And I said ojas designed the horn. I didn't say made it.
@@tmdillon1969 It's a Celestion CDX1-1740. Which is literally a K-702/CDX1-1742 with two changes: it uses a bolt up mounting pattern and it has an untreated Ti diaphragm instead of a Polyamide diaphragm.
I love Devon and his philosophy but his gear has gotten way too expensive for me. I remember when the artbook kits were still $1400.
Man the guy that runs that shop is so rude. Thought it was just me till I talked to others.
Really sorry to hear this. I guess it’s hit and miss.
Why do you always gloss over the heresy 3s
@@ramongomez6720 Heresy III’s? I have the II’s but just in case you are mixing them, the reason I always gloss over them is because I use them as a consistent frame of reference to gauge against. Feel free if you have any thoughts. Happy to consider. Thank you