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Multi-Way Conventional loudspeakers with crossovers

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Old 1st December 2010, 02:24 PM   #21
RDLewis is offline RDLewis  United Kingdom
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Have a look at Wayne Parham's site, "Pi Speakers". He has been this sort of thing for years. Wayne is a very helpful man and his forum is full of vital info

Roy
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Old 1st December 2010, 11:17 PM   #22
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Originally Posted by gainphile View Post
Yes. My own measurement. I was surprised myself. Had them in the garage for a year and never bothered (too skeptical to be that good)

1m, on axis, indoor. 5ms gate. I use them for my dipoles.
Now, measure the mid/high verticals....
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Old 2nd December 2010, 03:30 AM   #23
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Originally Posted by gainphile View Post
Yes. My own measurement. I was surprised myself. Had them in the garage for a year and never bothered (too skeptical to be that good)

1m, on axis, indoor. 5ms gate. I use them for my dipoles.
What made you finally measure them? Sweet speaker BTW!

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Dan, why would you measure at the lip axis?
That's where I wanted my listening axis of the finished speaker.

Dan
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Old 2nd December 2010, 11:29 AM   #24
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MCM H-65

Threaded Horn Lens | H-65 (H65) | Distributed By MCM
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Old 2nd December 2010, 12:45 PM   #25
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ev hr90 Constant Directivity horn 90 x 40 (Don Keele horn) with an ev dh7 1.4" compression driver, passive lift circuit (resistor paralle with cap, both in series with driver) also with cd-eq in active crossover, 24db crossing at 750hz. I just keep coming back to this system.

Click the image to open in full size.

http://archives.telex.com/archives/E...HR90%20EDS.pdf

33 page pdf, 70's paper by keele on cd horns
http://www.xlrtechs.com/dbkeele.com/...xp%20Horns.pdf

I've wanted to try the 400hz stereo lab horn, but it ain't cheap and I'd read a few posts mentioning beaming.

Defo (here at diyaudio.com) "I used to have a stereo-lab 400hz tractrix horn coupled to an Altec 299 1,4" compression driver. This combo beamed too much for my taste."


Norman

Last edited by norman bates; 2nd December 2010 at 12:49 PM.
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Old 2nd December 2010, 03:01 PM   #26
doug20 is offline doug20  United States
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Where can we buy the ev hr90 Constant Directivity horn 90 x 40??
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Old 2nd December 2010, 03:09 PM   #27
Flaesh is offline Flaesh  Russian Federation
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easy enough on ebay. (if you are in continuous US )
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Old 2nd December 2010, 03:29 PM   #28
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Originally Posted by aczern View Post
Something is off about those two sets of curves. The first family has very little directivity (spread) plus a pinching together at 3500 Hz. The second group has a very even spread. I don't think a different driver would cause the difference??

In general, could you guys give some info on measurement angles like: "Taken every 10 degrees" (or whatever)?

Thanks
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Old 2nd December 2010, 04:01 PM   #29
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Where can we buy the ev hr90 Constant Directivity horn 90 x 40??
These come up on eBay all the time. EV has another series of CD horns that I actually prefer (2 in throat): the HP 640 and HP 940.

Last edited by WithTarragon; 2nd December 2010 at 04:01 PM. Reason: ...
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Old 2nd December 2010, 04:20 PM   #30
Flaesh is offline Flaesh  Russian Federation
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but oversea shipping is unreal..
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