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Old 3rd January 2012, 06:29 PM   #921
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wondering do the ejmlc 300 be a good match to tad 4001 or 4003..and modification may be need to maximize the matching?
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Old 3rd January 2012, 06:43 PM   #922
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Quote:
Originally Posted by noah katz View Post
How so?

The directivity variation w/freq is nice and smooth, but decreasing, i.e. not CD.
I've messed around with ribbons on waveguides, and found a couple of issues. First, they blow up quickly. Second, the response usually looks like what you see with the larger ribbon from yesterday's post. Basically, at high frequency there's a lot of peaks and dips on and off-axis.

This is because of the geometry of the ribbon. Due to the large size, we're getting peaks.

So the performance of the LCY ribbon is exemplary. I imagine it's due to the small size of the ribbon and the excellent geometry of the horn.

As far as it NOT being constant directivity, I wouldn't expect it to be. It's not a CD horn.

I think that ribbons are attractive as a source for waveguides and horns, as the last octave tends to sound cleaner than a compression driver, due to the very good CSD.

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Old 3rd January 2012, 07:37 PM   #923
jzagaja is offline jzagaja  Poland
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Ribbon versus ringradiator (JMLC-1000).
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Old 6th January 2012, 03:34 PM   #924
Donovad is offline Donovad  United States
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Default Current Pricing for Group Buy

Ive been away from this thread for a bit so please forgive me if i missed an earlier post with explanations.
Is there a current pricelist for the group buy that includes new waveguides/horns like the EJMLC-600 ?
Or does the DIY Soundgroup website reflect the current pricing ?

And just for kicks, anyone care to comment on how the JMLC-200 would work with a fullrange driver like the Fostex F200a ?
I just happen to have a pair that need a new/interesting home.

Thanks all,

Daniel
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Old 6th January 2012, 03:54 PM   #925
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Originally Posted by jzagaja View Post
Ribbon versus ringradiator (JMLC-1000).
You are a rockstar! Great work.
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Old 6th January 2012, 03:54 PM   #926
badman is offline badman  United States
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That 8k ridge is a rough customer...
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Old 6th January 2012, 03:55 PM   #927
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Originally Posted by badman View Post
That 8k ridge is a rough customer...
Yep

The BMS performs pretty darn well. I have a Fountek ribbon here that I was going to try in some Unities, but I'm leaning towards going back to a compression driver because the ribbon sounds strained, and I don't have a compelling reason to use it.

Well, besides the novelty factor.
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Old 6th January 2012, 04:21 PM   #928
jzagaja is offline jzagaja  Poland
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Quote:
Originally Posted by Donovad View Post
Is there a current pricelist for the group buy that includes new waveguides/horns like the EJMLC-600 ?
Please send email to diysoundgroup.


Quote:
And just for kicks, anyone care to comment on how the JMLC-200 would work with a fullrange driver like the Fostex F200a ?
See hornresp simulation.
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Old 7th January 2012, 09:06 AM   #929
jzagaja is offline jzagaja  Poland
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Visaton B200 example in JMLC-200T.
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Old 8th January 2012, 03:17 PM   #930
jzagaja is offline jzagaja  Poland
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A highly recommended 3-way arrangement with driver, 8-12" woofer and subs.
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