Visaton open baffle project idea, opinions?

[DaveFred]

Update Aug 1, G25FFL in Waveguide

Hello there,

I have made a few changes to the design. I changed to the G25FFL in a wave guide for a tweeter and changed the baffle to a 2.5 cm flat panel with a smaller narrow baffle above it for the mid and the tweeter.

Here are the measurements,

If the real speaker is anything like the simulation, this looks very very good.

All crossover values are actual values that can be purchased at a store with correct resistance.

The directivity is incredible
(Die Direktivität ist unglaublich)

Do you think the real speaker will be anything like this when built?

[sobi]

Alternative zum BF32:

http://www.visaton.de/index.php/en/products/fullrange-systems/frs-5-x-8-ohm

Belastbarer und höherer Wirkungsgrad, vorallem im Hochtonbereich...

[DaveFred]

The "volume increase factor" should be set to 1 according to Boxsim FAQ11 for open baffle simulation. It does make a difference. As UweG said, no error will result as long as you use the most recent driver files, which are supplied with Boxsim 2.0. Driver updates can be found here.

Thank you for pointing me to the updated drivers. I am now using the new WS25E that does not get the error when the "volume increase factor" is set to 1.

[Fraggle]

The "volume increase factor" should be set to 1 according to Boxsim FAQ11 for open baffle simulation. It does make a difference. As UweG said, no error will result as long as you use the most recent driver files, which are supplied with Boxsim 2.0. Driver updates can be found here.

The directivity peak around 500 Hz could be reduced by moving the woofers closer to the AL130M.

The continuous power handling of the BF32 is only 2 Watt which is a bit worrying. A higher crossover would be safer.

[jama]

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

[jama]

so is okay for G20SC

[Markus213]

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.php?attachmentid=41455&stc=1&d=1563998996

http://www.visaton.de/vb/attachment.php?attachmentid=41456&stc=1&d=1563999023

July 22 simple baffle v5 pretty good v2 real values v3SW.BPJ

[bochsenbaua]

Maybe U could use a waveguide

[jama]

G20SC from 3000 Hz only, used G25 FFL

[DaveFred]

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]

so :

[Markus213]

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

[jama]

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

[DaveFred]

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]

WS25E-WS13E-SC10

SC10--> low budget tweeter 21,93€

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