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Old 26th August 2015, 11:28 AM   #1
MFF is offline MFF  Portugal
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Default Ceramic multicell horns

Recently I bought these ceramic multicell horns, they come with the specification of
Cutoff frequency 1600Hz
and Xover 3200Hz
They can be connected to with 1” compression drivers.

I am brand new at this I appreciate all the help.
Which compressor driver best fit this horns(frequency response should have) and what is the best working point.

Thanks for the help

MFF
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Last edited by MFF; 26th August 2015 at 01:32 PM.
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Old 26th August 2015, 02:05 PM   #2
xrk971 is offline xrk971  United States
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That is way cool. A ceramic-China bisque like multicellular horn!
Where did you buy this?

Pick your favorite 1in 2/3-bolt flange mount Cd - just about any can be crossed that high up no problem.

I have a PRV D280Ti and like it very much. Great smooth sound and well priced.
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Old 26th August 2015, 02:56 PM   #3
MFF is offline MFF  Portugal
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I Thanks for replying!
I bought them on ebay.


Cutoff frequency at 1600Hz it means the lower part of the frequency response
as it said to be Xover at 3200Hz is the region where the horn best responds
am I seeing this correctly?


Once again
Thanks for the help
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Old 26th August 2015, 03:10 PM   #4
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The best xover frequency may depend on your woofer. If you have a low frequency driver that will play high enough, a 3200 hz crossover might be a good idea because it will put the crossover outside of the vocal range.

If the low frequency driver dies before 1600hz, push the crossover down. It depends on the overall setup.

I think the best approach is the first, Get a cone driver that is almost a full range by itself, then use the horn to extend the HF past what the cone can do, as a great tweeter. This approach doesn't require much calculation and filter technology if the drivers are really good to start out with.

A single cap floating the tweeter in up high above a full range 12" or similar can sound really fine and this is a common DIY arrangement.
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Old 26th August 2015, 04:24 PM   #5
xrk971 is offline xrk971  United States
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Typically, if a horn extends to a certain frequency, in this case 1600Hz, a good practice is to set the XO at least an octave above so you get a smooth response in the stop band.

With steep XO's (4th order and higher) you can get much closer, like 2kHz even. But it also depends on how high up your mid or woofer is going.
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Old 27th August 2015, 12:00 AM   #6
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please post the eBay link. they are cute.
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Old 27th August 2015, 09:36 AM   #7
MFF is offline MFF  Portugal
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Here it is the eBay Link Ceramic Multicell Horns Pair for 1" HF Driver Altec JBL and Others | eBay
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Old 27th August 2015, 10:44 AM   #8
xrk971 is offline xrk971  United States
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Those are nice but not cheap. What is the physical size of the whole unit?
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Old 27th August 2015, 11:14 AM   #9
MFF is offline MFF  Portugal
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Specifications:
1 "connection
Ring Support - 8mm plywood, diameter 100mm (4 ")
Cutoff frequency - 1600Hz
Xover-3200Hz
Weight - 0.92 kg
Width 21cm (8.25 ") height 12,7sm (5 '), the length of 13cm (5,1")

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Old Yesterday, 09:52 AM   #10
DeonC is offline DeonC  South Africa
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These look nice for someone interested in multicell horns:

1 Pair Of 15 Cell Multicellular Horns for Altec,JBL,Electro Voice, Beyma Driver:

Click the image to open in full size.
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