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Multi-Way Conventional loudspeakers with crossovers

Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
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Old 9th October 2019, 01:49 PM   #3581
Ro808 is offline Ro808  Netherlands
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Interesting!

Lately, I've been looking into multicells and sectoral horns.
The Smith horn and derivates look good on paper, but I have my doubts about combination of vanes and the diffraction mouth.

If you want to optimize the Smith horn, you will probably get something similar to Joseph Crowe's Yuichi Radials> including roundovers by mouth.
Attached Images
File Type: jpg A DISTRIBUTED SOURCE HORN_1.jpg (181.4 KB, 260 views)
File Type: jpg A DISTRIBUTED SOURCE HORN_2.jpg (203.5 KB, 261 views)
File Type: jpg A DISTRIBUTED SOURCE HORN_3.jpg (22.8 KB, 251 views)

Last edited by Ro808; 9th October 2019 at 02:06 PM.
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Old 9th October 2019, 02:08 PM   #3582
phase_accurate is offline phase_accurate
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Rob

Do you have any idea at what frequency the modern Augspurgers are crossed over ?

Regards

Charles
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Old 9th October 2019, 02:14 PM   #3583
pelanj is offline pelanj  Czech Republic
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There are some good looking Smith Horns for 1" drivers on Ebay from Moldova, I bookmarked them for later, when there is some spare cash, I will definitely get a pair. The links are for reference: Horn 350 Hz 1 inches | eBay and https://www.ebay.com/i/112193907513

Could anyone experienced have a look at the dimensions if these look right? Especially the 350 Hz seems slightly small - or do the dimensions sound right? They are ~352*609*61 mm for the larger horn and 500*280*64 mm for the smaller one.
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Old 9th October 2019, 02:30 PM   #3584
Pano is offline Pano  United States
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Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
I had the good luck to be able to A/B a system with 15 cell horns verses one with a Smith horn. Identical drivers top and bottom. The 15 cell was my preference - because it sounded more life-like to me - but some other listeners preferred the Smith. It was much better than I expected. However for a DIY horn, the Smith is going to be waaaay easier to build.
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Old 9th October 2019, 03:05 PM   #3585
Ro808 is offline Ro808  Netherlands
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Augspurger horns in the later monitors are actually more akin to radial horns. In the past, Augspurger (also used) the Westlake style Smith derivatives, which came with, and without vanes (for the smaller HF horns).

Augspurgers are completely DSP-ed these days, but the old ones are presumably crossed at 800Hz or even higher, which is still quite low considering the size of the horns.
Anyway, Augspurer's old constant voltage networks are quite complicated/ingenious.

Here's an AES comment paper, in which he also touches on the angled baffles.
Attached Files
File Type: pdf Augspurger-comments-constant-voltage.pdf (311.7 KB, 22 views)

Last edited by Ro808; 9th October 2019 at 03:33 PM.
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Old 9th October 2019, 03:54 PM   #3586
Ro808 is offline Ro808  Netherlands
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BTW, George Augspurger is not actively involved with the current brand that bears his name.
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Old 9th October 2019, 04:21 PM   #3587
Ro808 is offline Ro808  Netherlands
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Westlake Smith horns, check the chamfered mouth:
Attached Images
File Type: jpg Westlake Audio Speakers Studio Monitor TM-1 TAD JBL Drivers.jpg (345.1 KB, 208 views)
File Type: jpg Westlakes 008.jpg (458.2 KB, 211 views)
File Type: jpg Westlakes 009.jpg (428.5 KB, 62 views)
File Type: jpg Westlakes 003.jpg (380.9 KB, 52 views)

Last edited by Ro808; 9th October 2019 at 04:23 PM.
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Old 9th October 2019, 04:46 PM   #3588
Ro808 is offline Ro808  Netherlands
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Augspurger Horn:
Attached Images
File Type: jpg 041f0ce4d7b29882a465485a50cf4f3a.jpg (221.8 KB, 54 views)
File Type: jpg Augspurger horn front800 (1).JPG (51.9 KB, 58 views)
File Type: jpg Augspurger horn back800 (1).JPG (51.8 KB, 46 views)
File Type: jpg Auspurger horn top800 (1).JPG (67.6 KB, 30 views)
File Type: jpg AugspurgerHornThroat4_800.JPG (106.9 KB, 30 views)
File Type: jpg AugspurgerHornThroat5_800.JPG (79.4 KB, 22 views)
File Type: jpg AugspurgerHornThroat6_800.JPG (73.3 KB, 22 views)
File Type: jpg AugspurgerHornThroatCU_800 (1).JPG (68.3 KB, 26 views)
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Old 9th October 2019, 04:56 PM   #3589
Pano is offline Pano  United States
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Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
It would be interesting to build and test the 3 versions of termination, all else being equal.
Smith, Westlake, Augspurger.
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Old 9th October 2019, 05:47 PM   #3590
Ro808 is offline Ro808  Netherlands
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That would be interesting indeed. Heritage forum members have built and measured Smith and 9800 horns.
The 9800 is similar to Yuichi and other radial horns, without vanes but with a pinched throat.

There's something about vanes, cells and sectors.

Pano, which multicells do you use?
Attached Images
File Type: jpg H9800.jpg (37.8 KB, 35 views)
File Type: jpg H9800 Top.jpg (31.0 KB, 38 views)
File Type: jpg DSCN2826.JPG (77.7 KB, 54 views)

Last edited by Ro808; 9th October 2019 at 05:53 PM.
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