Soliciting ideas for an ESL Soundbar - Page 2 - diyAudio
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Old 29th January 2014, 09:54 PM   #11
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These later designs attempt to address the issue. The circular designs would have a sound damping material to absorb the rear waves. The open designs would direct the waves up or down so they didn't interfere with the forward waves.

Thanks so much for all the help so far!

https://drive.google.com/file/d/0B-X...it?usp=sharing
https://drive.google.com/file/d/0B-X...it?usp=sharing
https://drive.google.com/file/d/0B-X...it?usp=sharing

Last edited by jmansummers; 29th January 2014 at 10:19 PM. Reason: Images dont seem to being uploaded correctly
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Old 29th January 2014, 10:25 PM   #12
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Please post your pictures Directly to your post as I can't access them without having to sign up to Google.

jer
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Old 29th January 2014, 10:31 PM   #13
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I tried absorbing the rear waves and I was not happy with the results.
You can try it, as it may suit your needs.
And you may find as I did that it is not necessary and would be a waste of material and work, to try and stop the backwave.
All that is required is to increase the path length from the front to back somehow.

jer
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Old 29th January 2014, 11:27 PM   #15
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Sorry one more attempt to upload the imaged embedded as [IMG] instead of [url] from my Google Drive account.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
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Old 29th January 2014, 11:34 PM   #16
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Nope they aren't working for me.

jer
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Old 30th January 2014, 12:08 AM   #17
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Here's one of the drawings, showing a larger version. This is interesting. I also saw another drawing showing a pair of vertical soundbars arranged one each side of the TV. That would get the stereo effect.

Click the image to open in full size.
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Old 30th January 2014, 12:25 AM   #18
sreten is offline sreten  United Kingdom
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Hi,

The short answer is don't even think about ESL's for such
an application, dipole roll-off is a major issue and trying
to enclose the rear wave of an ESL simply does not work.

Nevermind designing and building ESL panels is no trivial matter.

At a push each end of the bar could have an open backed ESL
tweeter, but in the larger scheme of things a very complicated
and expensive option compared to budget decent tweeters.

FWIW speakers are nearly always a very bad idea for an
Art and Design course unless you also happen to be very
good at engineering, as most of the design work is pure
engineering, balancing the myriad engineering design issues.

Even your typical mechanical or electrical engineering type
can make a complete pigs ear of designing decent speakers,
due to a lack of understanding of acoustics, and quite simply
the level of and type of analysis required is very inappropriate
for an Art and Design course. YMMV, if so good luck.

rgds, sreten.

Last edited by sreten; 30th January 2014 at 12:32 AM.
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Old 30th January 2014, 02:54 AM   #19
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Hey guys,

First of all sorry that I have been so unsuccessful at uploading the images here is a link that hopefully will work:

ESL SoundBar project by Jesse Summers at Coroflot.com

Sreten your absolutely right, I have little to no knowledge of loudspeaker engineering (that's why I'm soliciting help!) Even if the prototype we build ends up not sounding up to par I think it will be worth my time just as a learning experience. I like the idea of using ESL tweeters instead of panels. Also we are thinking that having a separate wireless woofer might be the better option as opposed to integrating mid-bass woofers into the unit.
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Old 30th January 2014, 05:11 AM   #20
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by jmansummers View Post
Sreten your absolutely right, I have little to no knowledge of loudspeaker
engineering (that's why I'm soliciting help!) Even if the prototype we build
ends up not sounding up to par I think it will be worth my time just as a
learning experience.
Hi,

Asking for help is a good idea, but realistically you don't understand
the fundamental issues your dealing with so your ideas are simply
fanciful imaginings that are way off the mark of basic reality.

FWIW I don't subscribe to the "you don't know it won't work
unless you build it" mentality. Its inane. I think your also
hopelessly out of you depth in trying to build a ESL panel,
nevermind use it properly, might be wrong, but I doubt it.

rgds, sreten.

However much it might appeal to your imagination if you
don't know much about speakers on a Art & Design
course you will only learn that you don't know enough.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 30th January 2014 at 05:18 AM.
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