Hi.
For years I have been thinking about a high quality mid high cabinet that would have the "sound quality of a studio monitor", high SPL, relatively low wight and acceptable size and a good dispersion trough out it's frequency range (preferably 90x40-60). It should also go down to 80hz.
I bought 2 BMS 4594 drivers about 4-5 years ago, but newer decided on the final plan.
Some types of Synergy horns where serious candidates but despite the good horizontal dispersion of a 90x50 synergy horn, the vertical dispersion is not that good due to it's size. And a lot of times it's difficult to put the wide cabinet in a narrow space. Another issue is if you have a low sealing than all of the low-mid frequencies will reflect back due to the wide vertical dispersion at those frequencies.
Peter Morris's and other members dipole designs on this forum inspired me a lot.
So I would like to thank you guys for that.
Counter to the synergy horn a dipole design has a very good vertical dispersion even at lower frequencies. And getting the crossover frequency low and the drivers close enough it can act as a good point source to. It can fit in narrow spaces, you can use it even at home. And when used in a low venue, you have less reflections of the sealing.
So here is my approach on a dipole mid-high design based on my priorities:
It would be very similar to Renkus-Heinz's STX4.
https://www.renkus-heinz.com/upload/st-stx4-datasheet-1.pdf
But less heavy (the STX4 weighs 50 Kg's) , it won't go as low (50Hz for the STX4, 80HZ for my design), and maybe a little bit smaller.
So I would use 4x8" drivers, 2 on the top and 2 on the bottom, with each 2 facing each other in 90 deg. In the middle the RCF HF950 with the BMS 4594 driver. But the cabinet should be wide enough to fit the 18 Sound XT1464 in case I would like to change the horn.
A 8" driver has 220 cm diameter. So the distance between the horn's center and the acoustical center of the drivers is 26cm.
650HZ 1/2WL = 26cm. So I guess it should work fine for the vertical dispersion.
I haven't decided what 8" driver should I use.
The B&C 8NDL51 is probably the best candidate. It has the best price/performance ratio.
The Beyma 8LW30 has a 2.5" VC and 250W, but it's a little bit heavier, more expensive, and it doesn't have a treated cone.
The 18Sound 8NMB420 has the highest SPL acording to sims (+3db in WinISD, +2db in Hornresp compared to the B&C), but it's the most expensive.
Attached are some comparison between the B&C and the 18Sound in WinISD and Hornresp.
The WinISD is 4x drivers at 1000w total (green is the B&C).
The Hornresp is 2x drivers facing each other in 90 deg with a vented back chamber at 500w total in 4Pi (black is the B&C).
For years I have been thinking about a high quality mid high cabinet that would have the "sound quality of a studio monitor", high SPL, relatively low wight and acceptable size and a good dispersion trough out it's frequency range (preferably 90x40-60). It should also go down to 80hz.
I bought 2 BMS 4594 drivers about 4-5 years ago, but newer decided on the final plan.
Some types of Synergy horns where serious candidates but despite the good horizontal dispersion of a 90x50 synergy horn, the vertical dispersion is not that good due to it's size. And a lot of times it's difficult to put the wide cabinet in a narrow space. Another issue is if you have a low sealing than all of the low-mid frequencies will reflect back due to the wide vertical dispersion at those frequencies.
Peter Morris's and other members dipole designs on this forum inspired me a lot.
So I would like to thank you guys for that.
Counter to the synergy horn a dipole design has a very good vertical dispersion even at lower frequencies. And getting the crossover frequency low and the drivers close enough it can act as a good point source to. It can fit in narrow spaces, you can use it even at home. And when used in a low venue, you have less reflections of the sealing.
So here is my approach on a dipole mid-high design based on my priorities:
It would be very similar to Renkus-Heinz's STX4.
https://www.renkus-heinz.com/upload/st-stx4-datasheet-1.pdf
But less heavy (the STX4 weighs 50 Kg's) , it won't go as low (50Hz for the STX4, 80HZ for my design), and maybe a little bit smaller.
So I would use 4x8" drivers, 2 on the top and 2 on the bottom, with each 2 facing each other in 90 deg. In the middle the RCF HF950 with the BMS 4594 driver. But the cabinet should be wide enough to fit the 18 Sound XT1464 in case I would like to change the horn.
A 8" driver has 220 cm diameter. So the distance between the horn's center and the acoustical center of the drivers is 26cm.
650HZ 1/2WL = 26cm. So I guess it should work fine for the vertical dispersion.
I haven't decided what 8" driver should I use.
The B&C 8NDL51 is probably the best candidate. It has the best price/performance ratio.
The Beyma 8LW30 has a 2.5" VC and 250W, but it's a little bit heavier, more expensive, and it doesn't have a treated cone.
The 18Sound 8NMB420 has the highest SPL acording to sims (+3db in WinISD, +2db in Hornresp compared to the B&C), but it's the most expensive.
Attached are some comparison between the B&C and the 18Sound in WinISD and Hornresp.
The WinISD is 4x drivers at 1000w total (green is the B&C).
The Hornresp is 2x drivers facing each other in 90 deg with a vented back chamber at 500w total in 4Pi (black is the B&C).