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Horn for Radian 950
Horn for Radian 950
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Old 30th April 2018, 09:42 PM   #1
Andrew1211 is offline Andrew1211  Ukraine
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Question Horn for Radian 950

Good day I’m building 3-way system with Radian 950, acoustic elegance td 15m and bms 4540 or radian 465 hf driver Finally i have gotten my radians and i need to find horns for them I’m looking at tractrix 200, jmlc 200t, 270 and jmlc 350 Jmlc 200t are too big for me, but if they are significantly better i will think about them Radian will be crossed with second order at 800hz Which horn will be better in your opinion? Thanks in advance.

Last edited by Andrew1211; 30th April 2018 at 09:45 PM.
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Old 30th April 2018, 10:41 PM   #2
Audiodidakt is offline Audiodidakt  Norway
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If you are crossing at 800 then jmlc 350 would be the one of the bunch, perhaps even the jmlc 400. But I would have gone for the 350.

I have 200t in the garage. Wish I bought a set of 350 when they showed up at the secondhand market some years ago.
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Old 30th April 2018, 10:50 PM   #3
Andrew1211 is offline Andrew1211  Ukraine
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Thanks
I have found some data on the site that is selling those horns
Doesn’t it means that jmlc is more beaming than tractrix?
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Old 30th April 2018, 11:07 PM   #4
Audiodidakt is offline Audiodidakt  Norway
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That is measurments with two different drivers.

Here is 200t with the same driver as the tractrix: JMLC-200T - Horns by Auto-Tech

You can compare e.g along the -5 db lines of the two

Jmlc might be more beamy but have a better upper end.
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Old 30th April 2018, 11:21 PM   #5
Andrew1211 is offline Andrew1211  Ukraine
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Do i need better upper end in three way system?
I just fear beamy and harsh sound
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Old 1st May 2018, 06:56 AM   #6
Audiodidakt is offline Audiodidakt  Norway
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I would not use a normal 2»-driver above 7k - this is the area where a 1»-driver excell over an 2».

The shorter the horn, the wider the dispersion. A 2» on a jmlc350 makes a reasonable short horn. I would not fear beaming up to 7k, which is propably the highest you would take it anyway? Have heard the 350 with a Gpa 288, i.e. 1.4»-throat (meaning longer horn). Sounded fantastic. Was crossed to a jmlc 1000 with a Gpa 802(?). I am not sure about the XO but presume somewhere between 3.5k and 8-9K
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Old 1st May 2018, 07:01 AM   #7
Audiodidakt is offline Audiodidakt  Norway
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As you can see if you compare the tractrix-plot with the 200t-plot, jmlc is smoother in the pass area. Whether this is audible, I do not know. Tractrix have a much smaller mouth, which makes intergration with other horns and drivers more easy (c-t-c distance)

My (and many others) choice is jmlc but I also know persons who have tested «everything» and ended with a tractrix in that frequence-area.
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Old 1st May 2018, 07:45 AM   #8
kodomo is offline kodomo  Turkey
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I use a tractrix 200 with Radian 850. I would have loved the JMLC 350 but I cross too low for that. JMLC 200 was great but physcially make it impossible with my setup as I also have a 110hz tractrix midbass.

If you are going for second order 800hz, go for the JMLC 350, similar radius at the mouth but about 10cm shallower than tractrix 200 which would be easier to physically integrate as well, it gets less in the way of your upper channels. You do not need a 950 for 800hz, you could have gone for radian 850, I find it to sound better than 950.

Mine cross to JMLC 1400. I have tried Tractrix 1000 and JMLC 1000 too and ended up with 1400.

Unlike audiodidakt, my tests were better with two channels above the tractrix rather than one. For about roughly 4500-10000hz, I have the jmlc 1400 with be 1" cd, and a fostex t500amkII above that. This give a much less beamy, open sound when you adjust their levels as well as time/phase alignment properly. I also use a 30ppi renticulated(i tried few different) foam plug for the 1400hz JMLC which further smooths out the sound without loosing detail (maybe helping homs issue). My xo is passive but adjustable with resistors, so I raise it up 1db to make up for the foam.
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Old 1st May 2018, 08:55 AM   #9
Audiodidakt is offline Audiodidakt  Norway
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I agree with two channels above, I have a Raal Lazy from 10k and upwards. What I meant to say was that you need something above the Radian 950 :-)
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Old 1st May 2018, 08:21 PM   #10
Andrew1211 is offline Andrew1211  Ukraine
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Thanks for your replies
So 800hz@2 order is not full potential of 950?
I feared that i can have problems with lower frequency than this
And what about jmlc vs e-jmlc?

Last edited by Andrew1211; 1st May 2018 at 08:24 PM.
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