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Multi-Way Conventional loudspeakers with crossovers

Horn Lens for BMS 4594HE
Horn Lens for BMS 4594HE
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Old 10th May 2019, 06:20 AM   #21
phase_accurate is offline phase_accurate
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Quote:
People getting carried away with sustained bass.
If they really overdo it then they can even be carried away BY sustained bass.
Sorry, couldn't resist.

Regards

Charles
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Old 10th May 2019, 06:41 AM   #22
InOtIn is offline InOtIn
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Originally Posted by rotgg View Post
I dont understand that either K-horn is much smaller also and can go lower. They seem to be longer though.

Not to mention the difference in price - the HF950 is 1/10th of the price of the SEOS-24.

Perhaps @jzagaja could chime in and explain.

Last edited by InOtIn; 10th May 2019 at 07:05 AM.
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Old 10th May 2019, 03:56 PM   #23
tommus is online now tommus  United States
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Originally Posted by InOtIn View Post
How come the RCF HF950 can have a lower cutoff than that of 400Hz at half the size of the SEOS-24? What’s the catch?
...and how does the HF @ the diffraction throat sound in real life?
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Old 10th May 2019, 04:12 PM   #24
InOtIn is offline InOtIn
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Originally Posted by tommus View Post
...and how does the HF @ the diffraction throat sound in real life?
I don’t know, I haven’t heard the HF950, but the measurements look pretty good and many have raved about the sound quality of Peter Morris’s PM90 that uses it.

But I suspect your question was more rhetorical - so feel free to elaborate why the smaller size of the HF950 would give rise to diffraction issues at the throat.

Last edited by InOtIn; 10th May 2019 at 04:17 PM.
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Old 10th May 2019, 04:45 PM   #25
phase_accurate is offline phase_accurate
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I'd say it isn't the size that gives issues with diffraction at the throat but rather the diffraction throat itself.

Regards

Charles
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Old 10th May 2019, 05:28 PM   #26
tommus is online now tommus  United States
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Yes people do rave about the PM90. I've never heard it. However looking at the actual horn that throat pinch is pretty extreme. In all my armchair exploration of CD horns this is frowned upon by the SEOS/hi-fi crowd due to "HOM" distortion or whatever. People who want 130db+ seem to have different expectations.

InOtIn, as I understand it, the 400Hz cutoff is for horn loading, not dispersion, and this is related to horn depth. Both the SEOS and the HF950 are about 8" deep IIRC. I wouldn't think the HF950 can hold its horizontal pattern below maybe 1.2kHz, with it's width being under 12 inches. The PM90 is not much wider so it is probably omni at the crossover.

So this horn looks like maybe the best 90deg CD horn for PA but is it "hi-fi?"

P.S I wish that QSC horn was available in a 1.4" throat. Maybe one day I'll try to ream one out and see what happens.

Last edited by tommus; 10th May 2019 at 05:40 PM. Reason: added comment
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Old 10th May 2019, 05:40 PM   #27
ErnieM is offline ErnieM  United States
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The XT1464 used in the PM60 is sonically superior to those who've heard both.
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Old 10th May 2019, 06:03 PM   #28
mark100 is offline mark100  United States
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Originally Posted by ErnieM View Post
The XT1464 used in the PM60 is sonically superior to those who've heard both.
I agree with that.
I built the PM boxes where I can swap between the HF950 and XT1464.

Sometimes I wonder if my preference for the XT1464, which has a bit more forward, immediate sound, isn't simply due to the narrower radiation pattern.
Dunno.....but all that said, I would definitely call the HF950 hifi too...it's not that far behind..

Been following this thread with great interest, very interested in what folks think would work best.
Thx all !
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Old 10th May 2019, 06:04 PM   #29
tommus is online now tommus  United States
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It's only 60deg though. I've been setting up my rig (DJs playing for smallish crowds) with the QSC 90deg horns widely separated with heavy toe-in at the dance floor and I'm in love with the presentation. Sounds great even at the DJ booth. I want to do this with more firepower.
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Old 10th May 2019, 06:26 PM   #30
rotgg is offline rotgg  United States
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I am thinking that I may need to buy a few of the different ones and test to see which I like the best. As there seem to be many different opinions. There seems to be no data on the large SEOS horns at all.
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