No can do re magnet mount. I think it was manually machined.
pairs of B&C DE250-8 & Eminence N151M 1" compression drivers along with a pair of B-52 PHRN-1014 10" x 14" 90x40 Horn
I also got a pair of SB Audience ROSSO-44CDN-PK which are clearly audibly superior to the other CDs above. A version with those in place of the BE domes will have to be tried.
cool, Thanks. I believe the B-52 is a QSC clone. Really good horn; Built some "econowave" deluxe with that horn.
I also pickup up a couple Faital horns my son picked up during a road trip to CA. They look promising. Will try ROSSO-44CDN-PK CD with them. Not sure how they will do on the top end >10khz
Hi Dayne, yes, the project continues.
Mark listened to that setup after several days of my work on the setup with the Beryllium dome Satori + waveguide-modded Yamaha JA0801. He loves how they sound.
But Mark wants better reliability & longevity. So he asked me to find the best modern current equivalent of the JA0801, which can only be found used, mostly 25+ years old. The natural choice is Bliesma M74B-6. Around CA$2500 and a couple weeks later, a pair of these lauded transducers arrived in my studio. Integrating them into the system with active Flex 8 DSP was easy. The Bliesma has great manufacturing quality, better top & directivity, and likely a smoother low end, too. But subjectively, the improvement over the old Yamaha is relatively subtle.
Once the config files were saved, the systems were broken down so the "enclosures" could be built. The plan was to paint the visible interior spaces of the bass bin black, skin it with 1/8" thick layer of BB plywood and add the top drivers in an extended baffle, the front of which would be 3/4" solid walnut.
That turned out to be extremely tedious and challenging. My woodworking skills are self-taught, and while I have many tools, my mastery with most is not complete. There have been lots of mornings when I identify & correct the mistakes made yesterday before I can move on to the next step. 😵 😕🤣
Mark listened to that setup after several days of my work on the setup with the Beryllium dome Satori + waveguide-modded Yamaha JA0801. He loves how they sound.
But Mark wants better reliability & longevity. So he asked me to find the best modern current equivalent of the JA0801, which can only be found used, mostly 25+ years old. The natural choice is Bliesma M74B-6. Around CA$2500 and a couple weeks later, a pair of these lauded transducers arrived in my studio. Integrating them into the system with active Flex 8 DSP was easy. The Bliesma has great manufacturing quality, better top & directivity, and likely a smoother low end, too. But subjectively, the improvement over the old Yamaha is relatively subtle.
Once the config files were saved, the systems were broken down so the "enclosures" could be built. The plan was to paint the visible interior spaces of the bass bin black, skin it with 1/8" thick layer of BB plywood and add the top drivers in an extended baffle, the front of which would be 3/4" solid walnut.
That turned out to be extremely tedious and challenging. My woodworking skills are self-taught, and while I have many tools, my mastery with most is not complete. There have been lots of mornings when I identify & correct the mistakes made yesterday before I can move on to the next step. 😵 😕🤣
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A few more pics of the development...
This is what's glued up & clamped in my studio today. I think both boxes will be ready for oil finishing by early-mid next week.
This is what's glued up & clamped in my studio today. I think both boxes will be ready for oil finishing by early-mid next week.
Im sure they will sound fantastic but what is the the thinking/theory with the dipole, dipole, monopole, monopole construction? 🙂
If you go back through earlier posts, you'd see that a big challenge of this project is it's final destination: a 52x30' virtually undamped room with 20' ceiling. At high SPL, the reverb becomes overwhelming, especially at the higher frequencies. My lx521 inspired 4-way OB sounded fine there except for this aspect.
So...
The notion is that dipole effects are most significant at lower frequencies. The system is dipole to the crossover between the Satori 24TX & the Bliesma mid dome. It becomes cardioid in the transition between them, above which it's all monopole.
I am hoping the higher directivity of the domes reduces the harsh treble reverb of the fully OB system at high SPL. There'll be less of that higher frequency energy distributed in the room.
Even if my hypothesis proves erroneous, that's ok, it may be the impetus for the end users to add acoustic damping of some kind.
The mockup sounded fantastic in my fairly well damped studio, 19x22' with gently sloped ceiling. Much of the spatial quality of my lx521 clones was there, with a bit more in your face intensity, esp. in the mids & highs. It sounded very dynamic, with wide frequency bandwidth, utterly detailed but still natural.
The final speakers will differ significantly from the mockup in that the upper 3 drivers were nude or near so. The final speakers will have a baffle as wide as the bass part. I am hoping the added diffraction won't take away too much of the magic. The drivers have been offset, mirror L-R, to ameliorate the wide baffle.
We'll see how well the last couple Flex 8 configurations from the mockup work when the final system is put together. Hopefully it won't demand major rework on the crossover/PEQ.