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Old 26th May 2019, 08:56 PM   #381
mbrennwa is offline mbrennwa  Switzerland
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How much work would it be to modify the existing oval design (for example the 5" version A) to a circular waveguide with an external diameter of 148 mm?
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probably easy, but it will measure differently. I can work on it tonight and post something.
Any progress?
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Old 26th May 2019, 11:39 PM   #382
augerpro is offline augerpro  United States
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I might just have a go at it
I took that as you were going to design one! Sorry. I'll work on it tomorrow.
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Old 26th May 2019, 11:53 PM   #383
mbrennwa is offline mbrennwa  Switzerland
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I might just have a go at it
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I took that as you were going to design one! Sorry. I'll work on it tomorrow.
Ah, sorry, I was confusing you. I have absolutely zero knowledge about working with 3D files. I was trying to say that I'll just send the file for the round waveguide to a CNC service and see how it measures with the Scan tweeters.

It would be great if the outer diameter would be identical to the WG148 (148 mm) so the baffle cut-out could be the same for both wave guides.
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Old 2nd June 2019, 06:56 PM   #384
Rokytheman is offline Rokytheman  Denmark
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Hi Augerpro,

Will you opload step file (in centimeters) of the 8" WG for the SB26ADC SB Acoustics tweeter ? :-)
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Old 4th June 2019, 02:27 AM   #385
augerpro is offline augerpro  United States
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Matthias> sorry for the delay, after making it round i kept getting a geometry failure and couldn't figure it out. Dropbox - 5x.75 A_cnc_circle v3.step - Simplify your life

Rokytheman> this doesn't include the phase shield because I don't think you could actually mill that. Dropbox - 8x1.5 D_cnc v2.step - Simplify your life
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Old 5th June 2019, 01:30 PM   #386
Rokytheman is offline Rokytheman  Denmark
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Thanks you very much !
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Old 5th June 2019, 02:46 PM   #387
mbrennwa is offline mbrennwa  Switzerland
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Thank you! I am on the go right now, but will take a look at the round Version asap!
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Old 6th June 2019, 09:45 AM   #388
InOtIn is offline InOtIn
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Brandon,

I got a pair of your 5" version type A waveguides that Matthias arranged through a group buy (really nice). I will probably be trying them out with a pair of D3004/602000 that I already got at hand.

I haven't really seen your directivity simulations or measurements so I ask you, at what frequency would the 5A WG best match a 6.5” mid-wioofer? Or better, what’s the directivity (horizontal and vertical, in degrees, at -6dB) and cut-off frequency (where it starts losing directivity) of this particular waveguide?
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Old 7th June 2019, 02:29 AM   #389
mbrennwa is offline mbrennwa  Switzerland
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I got a pair of your 5" version type A waveguides that Matthias arranged through a group buy (really nice) ... I haven't really seen your directivity simulations or measurements so I ask you, at what frequency would the 5A WG best match a 6.5” mid-wioofer? Or better, what’s the directivity (horizontal and vertical, in degrees, at -6dB) and cut-off frequency (where it starts losing directivity) of this particular waveguide?
Take a look at post 331.
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Old 12th June 2019, 05:31 AM   #390
mbrennwa is offline mbrennwa  Switzerland
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Matthias> sorry for the delay, after making it round i kept getting a geometry failure and couldn't figure it out. Dropbox - 5x.75 A_cnc_circle v3.step - Simplify your life
I just ordered a few of these from the CNC fab... let's see how they do.
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