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-   -   Visaton open baffle project idea, opinions? (http://www.visaton.de/vb/showthread.php?t=30665)

DaveFred 17.07.2019 04:19

Visaton open baffle project idea, opinions?
 
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Hello From Canada!

Sorry, I don't speak German, but I came here for the Visaton Expertise!

I am looking to make an all Visaton open baffle speaker with a maximum width of 38cm and maximum height of 120cm.

The budget is to be modest using a pair of inexpensive high QTS WS25E-8 10" woofers, an AL130M-8 for the important midrange and the G20SC for a tweeter with good off axis response.

I have attached a few graphics and the .BPJ file if anyone wants to look at it.

I followed the open baffle instructions for Boxsim at,

http://www.boxsim.de/FAQ/FAQ0011.html

But I had a little problem with the woofer settings, when I set the "Volume increase factor" to 1, the woofer response jumped to the top of the chart. When it changed it to 0.0000001, it seemed to work. I hope this does not make the results invalid.

What do you think?

jama 17.07.2019 09:10

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hi dave, sorry i speak french or german

I have simplified the filter

for a modest budget take the excellent and low budget SC13 instead of the AL130

jama 17.07.2019 10:00

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whit SC13 or WS-13E

UweG 17.07.2019 15:37

Zitat:

But I had a little problem with the woofer settings, when I set the "Volume increase factor" to 1, the woofer response jumped to the top of the chart. When it changed it to 0.0000001, it seemed to work. I hope this does not make the results invalid.
This is a bug in Boxsim 2.0. Best workaround is what jama already did. He used a newer driver file. This bug happens to all drivers that are measured on the wide side of the old test box.
It will be corrected in the next version.

jama 17.07.2019 16:18

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WS25E-WS13E-SC10

SC10--> low budget tweeter 21,93€

http://www.visaton.de/en/products/do.../sc-10-n-8-ohm

DaveFred 17.07.2019 18:59

Zitat:

Zitat von UweG (Beitrag 448204)
This is a bug in Boxsim 2.0. Best workaround is what jama already did. He used a newer driver file. This bug happens to all drivers that are measured on the wide side of the old test box.
It will be corrected in the next version.

Will using the value of 0.00000001 for "Volume increase factor" give valid / correct results?

jama 17.07.2019 21:27

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by reducing the height to 110cm the response curve is flatter between 500 Hz and 5000 Hz

Markus213 17.07.2019 22:27

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Ich würde so probieren. Man achte auf diese Resonanzstelle um 9kHz

http://www.visaton.de/vb/attachment....1&d=1548865053

jama 17.07.2019 23:13

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so :

DaveFred 23.07.2019 03:58

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I have been trying different baffle layouts where I can place the drivers all in the centre so their radiation patterns are symmetrical, and this is what I have come up with.

What do you think of this layout?

About the tweeter, do you think I am crossing the G20SC too low, or does it look fine?

For the crossover, I have used real values for everything of components I can source locally with correct OHM resistance for each. I used a 16g laminated steel inductor on the woofer, and 18g air core for the rest.

How accurate is Boxsim on open baffle designs like this?

I have included the Boxsim .BPJ file for you to look at as well.

Comments?

(P.S. I have cleaned up my crossover diagram, I didn't think of using three amps for a cleaner layout... :) )

Thank you,

David in Canada.

jama 23.07.2019 05:02

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G20SC from 3000 Hz only, used G25 FFL

http://www.visaton.de/vb/attachment....1&d=1563850943

bochsenbaua 24.07.2019 20:00

Maybe U could use a waveguide

Markus213 24.07.2019 22:13

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Diese Geschichte mit dem G20 ist nicht gut. Die deutschen Produkte sind sehr gut aber auch haben ihre Grenzen. Es ist von mir nur ein Vorschlag in welcher Richtung ich an deiner stelle gehen würde. Die Pegeln musst du dir selber anpassen.


http://www.visaton.de/vb/attachment....1&d=1563998996

http://www.visaton.de/vb/attachment....1&d=1563999023

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jama 24.07.2019 23:02

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so is okay for G20SC

jama 26.07.2019 00:41

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BF32 as tweeter --> advantage : real open tweeter, Al membran


http://www.visaton.de/vb/attachment....1&d=1564094441


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