Ever think of building a Cornu Spiral horn? Now you can! - Page 61

BWRX · 12th February 2013, 11:45 AM

Quote:

Originally Posted by BWRX

Some of you guys mentioned that one issue with the spiral horns relates to not filtering out the higher frequencies. This got me thinking about helmholtz resonators. It seems like you could add a helmholtz resonator (or band-stop filter) at the throat of the horn to help reject an unwanted frequency.

Taking the idea in another direction, you could add an expansion chamber between the driver airspace and the throat of the horn to create an acoustic lowpass filter.

Of course it seems like these could only potentially be accomplished with a 2 path horn in a square/rectangular shape.

Just found out this idea has already been investigated here: MJK - A Method for Designing a Compact Back Loaded Horn Loudspeaker System woohoo, more good reading!

Shame that there's not enough time to read all the interesting threads on diyaudio!

hajj · 12th February 2013, 11:49 AM

I has also been brought up in this current thread, but I haven't had the time to optimize the resonator dimensions to make them available to the cornu builders

Switters · 15th February 2013, 03:22 PM

Finished. Until some further modifications...

Benedetto · 15th February 2013, 03:27 PM

Very nice

Cal Weldon · 15th February 2013, 03:31 PM

They look great, nice job!

prezden · 15th February 2013, 07:14 PM

Nice looking Switters.

It's great to see some more creative finishes on these cabinets. Do they sound different placed on a diagonal?

Cal Weldon · 15th February 2013, 07:51 PM

Totally different

Have you seen the Shreddies commercials from a few years ago?

quote:
In January 2008, the company started a new ad campaign for new "Diamond Shreddies", Consumer reaction to the campaign has translated into a statistically significant sales increase, according to at least one media report on the campaign's success.[7] The campaign won the 2008 Grand Clio Award for Integrated (i.e. multiple media) Campaign.[8]

iko · 15th February 2013, 08:00 PM

Very nice!

Switters · 15th February 2013, 08:12 PM

Thank you all.

Quote:

Originally Posted by prezden

Do they sound different placed on a diagonal

I can't really say, this is the first and only positioning (hung on the wall) I've heard

Before, I listened to them placed against the wall horizontally but on a desk, not hung, so it isn't really comparable, they sound better now.

xrk971 · 15th February 2013, 08:20 PM

Switters,
Very nice job. they look great! It almost looks like hand-cut inlaid wood? What are your dimensions and type of driver?

X

15th February 2013, 03:27 PM	#604
Benedetto diyAudio Member Join Date: Nov 2007 Location: Knifetown-Germoney	Very nice __________________ preregulatorpeterE-MAIL

15th February 2013, 03:31 PM	#605
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	They look great, nice job! __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

15th February 2013, 07:51 PM	#607
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Totally different Have you seen the Shreddies commercials from a few years ago? quote: In January 2008, the company started a new ad campaign for new "Diamond Shreddies", Consumer reaction to the campaign has translated into a statistically significant sales increase, according to at least one media report on the campaign's success.[7] The campaign won the 2008 Grand Clio Award for Integrated (i.e. multiple media) Campaign.[8] __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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12th February 2013, 11:49 AM	#602
hajj diyAudio Member Join Date: Nov 2009	I has also been brought up in this current thread, but I haven't had the time to optimize the resonator dimensions to make them available to the cornu builders

15th February 2013, 07:14 PM	#606
prezden diyAudio Member Join Date: Nov 2008	Nice looking Switters. It's great to see some more creative finishes on these cabinets. Do they sound different placed on a diagonal?

15th February 2013, 08:00 PM	#608
iko diyAudio Moderator Join Date: May 2008 Location: Toronto	Very nice!

15th February 2013, 08:20 PM	#610
xrk971 diyAudio Member Join Date: Oct 2012 Location: Virginia	Switters, Very nice job. they look great! It almost looks like hand-cut inlaid wood? What are your dimensions and type of driver? X

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