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Multi-Way Conventional loudspeakers with crossovers

Point-source and the argument of less ways= coherency
Point-source and the argument of less ways= coherency
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Old 5th June 2019, 04:24 PM   #1
Ayya Khema is offline Ayya Khema  Canada
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Default Point-source and the argument of less ways= coherency

hey everyone

There seem to be an aspect of multi-way speakers that is often overlooked which is the importance of point source.

yes, a 3 way make every drivers perform at their best in their specific range, but once placed on a baffle and you have say a 15 inch then a 6.5 inch mid then a 1 inch tweeter, the distance between the woofer and the treble is obvious and the ear definitely can pick this up if you compare it to a wide band speaker or a coaxial.

I can say I have never heard nor own a 3 way that I could live with because I could always either hear the transition from the big woofer to the mids, or the woofer and tweeter seemed disconnected.

it seems only Geithain build their 3 way with the point source in mind.

Anyways, I wanted to start a conversation about this topic and know your thoughts on that aspect.
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Old 5th June 2019, 05:22 PM   #2
CharlieLaub is offline CharlieLaub  United States
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This thread should make for good entertainment... I am subscribed!
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Old 5th June 2019, 05:29 PM   #3
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by Ayya Khema View Post
it seems only Geithain build their 3 way with the point source in mind.
It seems they've found a USP?

Except for oval car speakers

Last edited by scottjoplin; 5th June 2019 at 05:58 PM.
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Old 5th June 2019, 05:35 PM   #4
picowallspeaker is offline picowallspeaker  Italy
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My actual system is: 3 way freestanding speaker with 4.5" woofer, 2" midrange and AMT ( Dayton mini) tweeter.
Guess why!?
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Old 5th June 2019, 05:53 PM   #5
norman bates is offline norman bates  United States
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There are so many ways to what one thinks is better.

There is a large following for point source for a good reason.


I understand about the handoff.
Currently, i am sensitive to x-over in voice / bass range.
Middle c is what 440hz, where we would tune for band in school ?
Much is happening an octave below that.

But i had luck with thiel cs2 (6db time aligned 3-way), but woof was far from mid/tweet, so 10' distance + was beter to my ears.


And yes, this thread may get hot !!!!
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Old 5th June 2019, 06:45 PM   #6
KCHANG is offline KCHANG  United States
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Middle C (C4) is ~ 261.6Hz. A4 is 440Hz.

Kurt
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Old 5th June 2019, 06:59 PM   #7
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by picowallspeaker View Post
My actual system is: 3 way freestanding speaker with 4.5" woofer, 2" midrange and AMT ( Dayton mini) tweeter.
Guess why!?
You don't like bass?
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Old 5th June 2019, 07:06 PM   #8
mountainman bob is offline mountainman bob  United States
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Quote:
Originally Posted by picowallspeaker View Post
My actual system is: 3 way freestanding speaker with 4.5" woofer, 2" midrange and AMT ( Dayton mini) tweeter.
Guess why!?
They each sit on top of a Dayton ultimax 15 ?
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Old 5th June 2019, 07:11 PM   #9
mountainman bob is offline mountainman bob  United States
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What about a coax....say 6” or 8” Crossed low to a 12” in the same box?

Don’t really see much of that in three way design ....is there a reason?
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Old 5th June 2019, 07:31 PM   #10
bentoronto is offline bentoronto  Canada
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Point-source and the argument of less ways= coherency
Quote:
Originally Posted by Ayya Khema View Post
it seems only Geithain build their 3 way with the point source in mind..
Dayton-Wright electrostatic cells were mounted on panels forming a segment of a sphere, hence origin was a point source by design intention. Some would definitely put those speakers in the running for greatest speakers ever ever.

Many other ESL speakers are curved or have cells arrayed on a curve although that is to address high freq beaming issues.

For sure, the notion has been nascent for a long time for obvious physics-science abstract logic even in the absence of any psychoacoustic-science support that i can recall.

Aside from the amusement benefits of this thread predicted in a previous post and whatever the value of a point source origin (or phases or time adjustment or XO curve or....), let me be clear that from my perspective, you are exceptional in hearing stuff none of us terrestrially limited souls can hear. (Unless there's something notably faulty about your system that anybody else can immediately detect.)

With your drivers set up vertically, you seem to be very sensitive to vertical localization. That is exceptional, at least in the absence of blind-test disconfirmation.

B.
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Last edited by bentoronto; 5th June 2019 at 07:42 PM.
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