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-   -   Open source Waveguides for CNC & 3D printing! (https://www.diyaudio.com/forums/multi-way/318190-source-waveguides-cnc-3d-printing.html)

augerpro 20th November 2019 02:51 AM

Quote:

Originally Posted by Arnandsway (https://www.diyaudio.com/forums/multi-way/318190-source-waveguides-cnc-3d-printing-post5969171.html#post5969171)
How can I best use an EQ to make the boost by the WG flat again?
I'm going to use the SB26 with the 6" WG.

You can use a shelf filter, or sometimes just the typical high pass filter can flatten it out if you have Fc at the right frequency.

mbrennwa 20th November 2019 05:44 AM

Quote:

Originally Posted by Arnandsway (https://www.diyaudio.com/forums/multi-way/318190-source-waveguides-cnc-3d-printing-post5969171.html#post5969171)
How can I best use an EQ to make the boost by the WG flat again?
I'm going to use the SB26 with the 6" WG.

Do you really want it flat, on axis? Think again... the perceived sound balance corresponds to the power response, not the on-axis response. The power response is the integrated sound power radiated into the room. The power response does not change as much as the on axis response when you add a waveguide to a tweeter.

augerpro 21st November 2019 10:29 PM

Anyone familiar with wavelet analysis? What parameters would one use for analyzing waveguides?

maiky76 26th November 2019 01:13 AM

Quote:

Originally Posted by augerpro (https://www.diyaudio.com/forums/multi-way/318190-source-waveguides-cnc-3d-printing-post5983656.html#post5983656)
Anyone familiar with wavelet analysis? What parameters would one use for analyzing waveguides?


Hi,

Maybe you could have a look there.

HTML Code:

http://elias.altervista.org/html/Wavelet_software.html
M

augerpro 28th November 2019 12:06 AM

That doesn't really tell me anything about what parameters to use. Here is pic of what I mean, might take Soundeasy users to help me out:

https://i.imgur.com/PfTj1Cd.png

briskly 28th November 2019 02:47 PM

See the manual, Chapter 16.3.
Time step is the time scale used, based on sample rate. Range refers to the amplitude representation.
Higher scale values yield more frequency resolution at the expense of time, lower values yield the reverse.

Try a higher scaling when looking at high-frequency behavior.

Arnandsway 16th December 2019 05:26 PM

Quote:

Originally Posted by mbrennwa (https://www.diyaudio.com/forums/multi-way/318190-source-waveguides-cnc-3d-printing-post5981535.html#post5981535)
Do you really want it flat, on axis? Think again... the perceived sound balance corresponds to the power response, not the on-axis response. The power response is the integrated sound power radiated into the room. The power response does not change as much as the on axis response when you add a waveguide to a tweeter.

Huh. This is new to me. I thought, because of the boost visible in the measurements, one should make it flat on-axis. Isn't the same done with a bigger horn?

mbrennwa 17th December 2019 05:49 AM

Quote:

Originally Posted by Arnandsway (https://www.diyaudio.com/forums/multi-way/318190-source-waveguides-cnc-3d-printing-post6011322.html#post6011322)
Huh. This is new to me. I thought, because of the boost visible in the measurements, one should make it flat on-axis. Isn't the same done with a bigger horn?

Which measurements? You need to understand what the measurements mean, and how to interpret them. If in doubt, do some experiments to learn how the results from a microphone correlate with what your ears tell you.

Arnandsway 13th January 2020 06:16 PM

What do you guys think of this? :)
Simulated the response via the diffraction tool and SPL tracing the 5" WG for the SB26ADC. Woofer is the SB17NBAC-4, sub CSS SDX10.

https://imgur.com/a/eGhSWR8Concept - Album on Imgur


(I can't seem to plug images directly)

augerpro 13th January 2020 09:33 PM

Interesting. I have a 6.5" on tap for the SB26 for those lower crossover frequencies. Maybe you could trace the factory SB26ADC curves and see what improvement you already have over that?


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