A – 2″ 60°x 40° FLAT FRONT BI-RADIAL HORN. The A JBL 2″ horn has a very controlled & tight coverage of 60°x 50°. Excellent directivity factor of Find great deals for JBL a 60x 40 Flat Front Bi Radial Horn. Shop with confidence on eBay!. The JBL A Bi-Radial. horn is designed for flush cabinet mounting or compact cluster A has a nominal 60° horizontal x 40° vertical.
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After in taking into account your comments about room coverage.
JBL A FLAT-FRONT BI-RADIAL
I had 2385s on the system initially and preferred the A’s. Then the a might be better choice, as far as matching the 12″ driver’s dispersion characteristics at 1 KHz. And maybe, that explains why nobody makes a larger version of the A. I would strongly recommend going with a slightly higher crossover point of Hz with the a. I use A horn with h drivers in my ht. Is it your setup in your avatar? Or, if you really like jvlrun two of them jbp a degree angle between them. Something to consider is the dispersions characteristics of the other components.
Baron, One more jbp Zilch has already done a lot of the hard work involved in designing a system around this pair. But still, when you are listening in that spot, boy it’s so sweet For room coverage, I can fully understand why you like the baby-cheeks. Blaster, Thanks for the reply, I didn’t even think of a A. Also thanks for sharing your Xover points. Try an Hz crossover for the Hi Lutz What other components are you planning on using with the or horn?
But there are still some small changes in the horizontal dispersion as well. And switching to Hz cleared things up nicely. The delay due to driver distance needs attention on this bjl. The frequency response was a little choppy. JBL does or did make large biradial horns of that type–the series.
Forum members who have made room for them, even temporarily, report quite good results. Can you post some pictures on it?
I agree that the is far too “long throw” for your room. Should you consider a pair of the ‘s, I have a pair sitting in storage. Lutz, I had a similar jl that ended up as per side 2- 15″ h’s 1- 12″ H 1- 2″ H on a A H tweeter I don’t think it was a ideal system but it had a lot of range.
Hi Lutz, I have run all three flat front horns in all different sizes of room. But, assuming for a moment, that you really got your heart set on a 2″ throat Flat-Front Bi-Radial Horn, then swapping out the for something else might be a better choice.
I will post pic’s next week. Based on the fact that the has a 90 degree horz. Honestly, for me the sounded so much better in the “sweet spot” jhl I stuck with the ‘s because I felt I got better HF coverage in room as a whole.
Here is a picture of a pair of ‘s with the snout removed and mated to a pair of DDS horns that are very similar to the in pattern. Unfortunately, that “sweet spot” is pretty small. I have used nearly all 2″ horns jbl has made in various projects and while the will give you the wide dispersion, the X series of 1.
I have done this and it sounds pretty darn good. Since, you are also suggesting on using a 12″ driver as a low-mid range driver.
A or A [Archive] – Lansing Heritage Forums
The is nice but the is even better. Fortunately, most of this change is in it’s vertical 238a pattern. And for some strange reason, I have always prefered the old driver to the ‘s, but thats just me. And for the a Horn there are several options, the “Slot” or the new with the right PT wave guide would be best.
I think based on what you are doing I will try moving my Xover point for my a little higher. This does make a difference when there aren’t any reflective walls and the crossover point is low. Your right, it does match the ‘s. I feel the shorter throw horns sound better in a room. One advantage not mentioned is the pattern control on the “large format” series over the flat-front series.
Images : JBL 2385A
On the point of coverage, the a would do a better job. Make sure that you 23855a the all the way up and just bring the UHF in at 10k or 12k with a 6db rolloff just to fill in the top end. Then I am not sure that any of the Flat-Front Bi-Radial Horns would be a good match as far as dispersion patterns are concerned.