The DE85 is a favorite driver among PA people, along with the Beyma CP 6../7../8.. series. It's not for nothing these are often cloned by competitors, or Chinese manufacturers (as shown previously).
It's basically an upgraded version of the DE75 (which I'm currently using), with the addition of a copper shorting ring.
Provided a Mylar suspended diaphragm is used, these are excellent sounding drivers with a glorious midrange.
Recently, I was tempted to buy newer neo B&C 800 & 900 series drivers, but these didn't quite cut it compared to the RCF drivers of the 8.. and 9.. series.
Admittedly, the B&Cs were fitted with all-Titanium diaphragms.
It's basically an upgraded version of the DE75 (which I'm currently using), with the addition of a copper shorting ring.
Provided a Mylar suspended diaphragm is used, these are excellent sounding drivers with a glorious midrange.
Recently, I was tempted to buy newer neo B&C 800 & 900 series drivers, but these didn't quite cut it compared to the RCF drivers of the 8.. and 9.. series.
Admittedly, the B&Cs were fitted with all-Titanium diaphragms.
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Weltersys' comprehensive compression driver evaluation includes the DE82, which is the 1.4" exit version of the DE85. It was the second best driver, behind the EV DH1A.
1 used DH1A would cost about twice the price I paid for both the DE85s. In addition, the B&Cs are considerably more lightweight.
Art Welter attached many soundclips, which makes comparison of the tested drivers somewhat more lifelike.
1 used DH1A would cost about twice the price I paid for both the DE85s. In addition, the B&Cs are considerably more lightweight.
Art Welter attached many soundclips, which makes comparison of the tested drivers somewhat more lifelike.
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A series of interesting threads by the late & great Zilch (Evan Flavell).
Quick & Dirty 4430-Inspired Two-Ways
- Quick & Dirty 4430-Inspired Contents
- Quick & Dirty 4430-Inspired Two-Ways Part I
- Quick & Dirty 4430-Inspired Two-Ways Part II
Quick & Dirty 4430-Inspired Two-Ways
- Quick & Dirty 4430-Inspired Contents
- Quick & Dirty 4430-Inspired Two-Ways Part I
- Quick & Dirty 4430-Inspired Two-Ways Part II
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Thanks Art - unquestionably the simplest approach that I have seen in this regard. Buy a premade large horn and just add some woofers to the sides - how much simpler could it possibly get!!
One of the four loudspeakers drivers is devoted to encounter the horn at the crossover cutting frequency or all these ones are together on the same frequency range ?
PS : google traduction is injecting mistakes in my sentences 😡
PS : google traduction is injecting mistakes in my sentences 😡
Is it simple? I guess you could use horn resp to envision some aspects considering cavity volumes and hole size....but someone did tell me that the holes should be as far away from the throat as possible.
For slot loading my midrange 15" I can just put a slotted baffle in front of the driver with minimal cavity space?
The Genelec 8351 is just a slot loaded Bass woofer with a coaxial mounted on the baffle doing the slot loading? Is that safe to say?
When using a large CD that goes low it is pretty simple and much easier to get a good result. The further the woofer ports are away from the throat the less impact they have on the tweeter response.
You can certainly use Hornresp to get a very good idea of the low pass filter that will be created from the mass of air trapped under the cone and the response of the woofer with different port sizes depths.
When you are looking at crossing at 500Hz or lower you might be able to get away without any cone filler depending on the shape of the woofer cone, Mark100's latest synergy attempt is using a 10FE200 with a shallow cone and he is getting 500Hz without a filler.
Slot loading a woofer outside the horn can work too look at bill waslo's small syns. But that was smaller drivers arrayed to extend the directivity of a small horn.
Big horn with holes in the side works well if you have the space 🙂
looking at PPSLoading the 18h+ vertically with a ~1200csa (6"xsomething) slot...little under half the csa of the woofers sd and also vertically slot loading the 15", above, at a similar width as below ~6 inches...I think doing this to the mid, will increase direct energy, on axis. Just an idea at this point. Someone suggested slot loading to me before, for the part of fixing lobing issues between the horn, by decreasing verticle surface area, now that I can model it correctly, lets see what can be done.
In order to keep up with the Axi2050 in a Synergy or plain horn, you'll need more than just a few slot-loaded woofers.
Check the threads on this forum.
Check the threads on this forum.
Is "keeping up" an aspect outside of spl that I haven't grasped? For me, attempting to match the horn driver has been; high sens/eff, light cones...done. If slot loading has a negative effect on "keeping up" then I wouldn't do it, to the 15 at least.
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To be clear PPSL means push pull slot loading, that is two drivers in the same enclosure in push pull with a slot in between.
There is no real lobing issue when you are down at 200Hz, and if there was you would need the slot to be oriented horizontally to reduce centre to centre distance between the drivers to make it better.
Yes and I have 2 18's who might be subjected to that but I'll be forced to turn one to face the other in order to keep the design from being so wide....So its still PPSL or is PP referring strictly to having one linear movement in each direction....maybe its Push-Push? Slot loading for the 15"...but then Ro808 said the stuff about being able to keep up with axi2050 and now I'm confused....if I don't slot load the 15"....it will be able to keep up now? Why?
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