Stargate 6 Horn System

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POOH

POOH

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Joined 2010
Thanks :)

The extra woofer is one of my Yorkshire terriers - Frank :) - he just turned 17 solar orbits :D

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POOH

POOH

Member
Joined 2010
Coherence - The system MAY actually have an additional channel added back for low treble. The Renkus driver actually sounds a bit better then the Celestion 1425 in the 2k to 4K range but yes at the cost of overall coherence. I had the 1425 setup on an adjustable jig mount that could get the measured alignment very precise and i used different crossover techniques but still preferred the 5 way when listening from the center listening area. When out side the area the extra driver sounds better and not because it handles the low range better but because the 1425 is in a broader radiation horn and i'm getting better power response. So now i must decide to find 1) a better driver than the the 1425 in the low treble with a wider radiation horn or 2) a wider radiation horn for the Renkus to match my treble horn or 3) leave it alone , enjoy, and sit in the sweet spot :)
 
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JoshK

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Joined 2004
Hmm...this is the first time I am seeing this. That CMCD looks like it would be ideal with my 140hz LeCleach horns, that have 4" throats. That would make an interesting system. I am currently selling those horns somewhere else and don't mean to shill, just thought that was a coincidental encounter. I wish I had the room to set them up. I would keep them and try this combo out.

What kind of top end are you getting? It would be interesting to compare to the Faital M5N12-80 that I was intending to use (got that idea from JLH). Those drivers have about a 4" cone on them not including surround, so pretty close to throat size.
 
POOH

POOH

Member
Joined 2010
The JBL CMCD81H I have has nearly perfect response in my shortened 180 Hz horns 300-2.2K - above that it does exhibit some break up and should not be used . I use a narrow band trap filter on mine and crossover electronically. To compare to other cones I have used in the same horns (probably 20 of them) they are far superior in being linear, putting out the energy in the upper range and just overall sounding real. I have never heard midrange from a speaker to equal this regardless of it being horn, ribbon, electrostatic or planar. It is that good. I have not used the Faital driver you have.
 
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JoshK

Member
Joined 2004
The one gripe about the phase plug and resultant upper extension is the lack of attention to polar matching at the crossover region. The higher you push the horn's pass band the more narrow the directivity. Problem as I see it, the next horn will have its widest directivity at the lower portion of its passband, so where you are intending to cross you have a big mismatch in directivity. The crossover is fine on-axis, but what we hear is so much more than the on-axis that the spectral distribution in room is off.

It might seem academic, but I think that horns should be used over a conservatively chosen passband, so phase plugs in this case are not your friend. If I were to pick up these drivers to experiment in my horns, I'd still test out the phase plugs, but more than likely I'd abandon them in the complete system.

In this regards, I wholly agree with Romy and other astute horn aficionado's that designing horns is more about how it fits together in a complete system rather than making the best stand alone single horn.
 
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