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Acoustic Horn Design - The Practical Way
Acoustic Horn Design - The Practical Way
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Old 3rd December 2020, 04:58 PM   #111
pelanj is offline pelanj  Czech Republic
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Acoustic Horn Design - The Practical Way
I found out that my printer should be able (in theory) to print the same waveguide if was scaled up to 400 mm overall diameter (from 260 mm). It would be printed in around 25 h and use a little above 1 kg of PETG filament. That makes me think about buying some 1.4" drivers
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Old 3rd December 2020, 08:19 PM   #112
mabat is offline mabat  Czech Republic
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Sure, you could do that. As a result everything would just shift on the frequency axis to the left in the same ratio as the sizes. In this case it would be the ratio 1.4 - what was at 1400 Hz before will be at 1000 Hz now. This would hold for all the variables - the DI, HOM cut-ons or radiation impedance.
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Old 4th December 2020, 06:47 AM   #113
Rxdroid is offline Rxdroid  Spain
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Quote:
Originally Posted by Patrick Bateman View Post
Keep in mind that you have to redesign the crossover, now that you're using a waveguide. The 'stock' Linn crossover will no longer be correct.

Or at the very least, measure the speaker and then use an equalizer to fix the response.
Hi,

Thanks for the note, I have a speaker with a horn and another without, I'll take the measurements, interesting

thanks

Un saludo
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Old 22nd December 2020, 08:37 PM   #114
pelanj is offline pelanj  Czech Republic
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Acoustic Horn Design - The Practical Way
Today I finally managed to measure the waveguide with DE500. I would say this is impressive.
Attached Images
File Type: jpg DE500-ATH260.jpg (184.5 KB, 547 views)
File Type: jpg DE500-ATH260Dir.jpg (38.0 KB, 538 views)
Attached Files
File Type: zip DE500-ATH260.zip (66.5 KB, 21 views)
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Old 22nd December 2020, 09:04 PM   #115
atico5007 is offline atico5007  Argentina
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Oh! F*ck! That is impressive indeed!
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Old 26th December 2020, 02:18 AM   #116
grindstone is offline grindstone  United States
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What he said...nice work!
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Old 26th December 2020, 03:49 AM   #117
Patrick Bateman is offline Patrick Bateman  United States
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Click the image to open in full size.

Click the image to open in full size.

I believe these are pics of the waveguide, from here: Acoustic Horn Design - The Practical Way
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Old 26th December 2020, 10:13 AM   #118
mabat is offline mabat  Czech Republic
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Thanks. Here is a comparison with DE502 in "the same" waveguide:

Acoustic Horn Design - The Practical Way-de500-vs-de502-png
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File Type: png de500-vs-de502.png (216.4 KB, 578 views)
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Old 9th February 2021, 05:50 AM   #119
WT is offline WT
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I print ST260 waveguide and this is my measurement with Denovo audio DNA360 compression driver.
Attached Images
File Type: jpg ST260.jpg (127.7 KB, 115 views)
File Type: jpg 146170152_454064659052884_3196160463390514762_n.jpg (161.3 KB, 151 views)
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Old 9th February 2021, 06:24 AM   #120
mabat is offline mabat  Czech Republic
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Thanks! The print quality is awesome but the results are suspiciously bad.

Is this anechoic? Looks strange. I'm quite sure there's still something wrong somewhere else then with the WG or the driver itself.
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