I finished my first open baffle speakers a couple months ago (NaO Mini’s), which I’m extremely happy with. I love the huge sound stage they project and this got me interested in the concept of omnidirectional speakers. In doing a little research, I ran across the Duevel loudspeakers. They use up or down firing drivers that utilize a cone shaped horn/deflector to create a 360º radiation pattern. The reviews on the Duevel speakers are very good.
I have been thinking of doing somewhat of a clone of a cross between their Bella Luna
Bella Luna
and their Venus models
Venus
The Bella Luna seems to be very efficient for a two driver, 2-way system and a concern I had was how to make a reasonably efficient DIY version. I was hoping to use drivers that are fairly typical to the type of DIY projects we see on this forum regularly, ones that are well known and well measured. My thoughts were to use a body like the Bella Luna, but with a deflector/horn more like the Venus. I believe someone reasonably skilled with a lathe could turn these, once a design shape was determined.
The attachment below shows various conceptual plans for the speakers that have been bouncing around in my head.
My first thought was to add a second 7” or 8” driver on the opposite end of the main body firing down to increase efficiency. Perhaps a 2.5way arrangement?
My second thought was to go 3-way, using an up firing 7” or 8” driver, a down firing tweeter, but add a low frequency driver that fires down toward the floor, perhaps a ported 10” or a sealed 10” powered sub driver.
The third through fifth concept us based on the idea of an array of 4”-5” drivers, with a small flange, 2.5” or so, dome or ring radiator tweeter located in the center of the array. My thinking was that since the array would be evenly deflected 360º off the horn/deflector, that it would not suffer the same problems that it might if it was firing directly at the listener. I did a little modeling in Unibox and found that four RS125S-8’s, wired parallel in series, would match the efficiency of the tweeter and allow pretty high SPL’s with an F3 of 118hz in a 8L box. Combine this with either a down-firing or up-firing 10’ driver or powered sub and it looked interesting also.
The concepts I show below use 12”x12” boxes with a total height in the range of 38” to 40”.
I’d love to get feedback from anyone who is interested in the omnidirectional concept, or who wished to comment on or give me direction/guidance on how to move forward.
Thanks for any thoughts.
I have been thinking of doing somewhat of a clone of a cross between their Bella Luna
Bella Luna
and their Venus models
Venus
The Bella Luna seems to be very efficient for a two driver, 2-way system and a concern I had was how to make a reasonably efficient DIY version. I was hoping to use drivers that are fairly typical to the type of DIY projects we see on this forum regularly, ones that are well known and well measured. My thoughts were to use a body like the Bella Luna, but with a deflector/horn more like the Venus. I believe someone reasonably skilled with a lathe could turn these, once a design shape was determined.
The attachment below shows various conceptual plans for the speakers that have been bouncing around in my head.
My first thought was to add a second 7” or 8” driver on the opposite end of the main body firing down to increase efficiency. Perhaps a 2.5way arrangement?
My second thought was to go 3-way, using an up firing 7” or 8” driver, a down firing tweeter, but add a low frequency driver that fires down toward the floor, perhaps a ported 10” or a sealed 10” powered sub driver.
The third through fifth concept us based on the idea of an array of 4”-5” drivers, with a small flange, 2.5” or so, dome or ring radiator tweeter located in the center of the array. My thinking was that since the array would be evenly deflected 360º off the horn/deflector, that it would not suffer the same problems that it might if it was firing directly at the listener. I did a little modeling in Unibox and found that four RS125S-8’s, wired parallel in series, would match the efficiency of the tweeter and allow pretty high SPL’s with an F3 of 118hz in a 8L box. Combine this with either a down-firing or up-firing 10’ driver or powered sub and it looked interesting also.
The concepts I show below use 12”x12” boxes with a total height in the range of 38” to 40”.
I’d love to get feedback from anyone who is interested in the omnidirectional concept, or who wished to comment on or give me direction/guidance on how to move forward.
Thanks for any thoughts.
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