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Old 28th March 2014, 08:44 PM   #1
Squeak is offline Squeak  Denmark
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Default Opposed dual ports. Will it work?

Would a port like this work?

Click the image to open in full size.

For a flat wallhanging speaker, I want to hide the bindingposts and this seems like good way to put them in the port, while still making them operable.
But will it work well with a split port with the two halves firing into each other?

Last edited by Squeak; 28th March 2014 at 10:30 PM.
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Old 28th March 2014, 10:06 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

The port will be modified by the spacing to the rear wall.
but yes it will work, hard to predict how well it works.

rgds, sreten.
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Old 28th March 2014, 10:13 PM   #3
chrisb is offline chrisb  Canada
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If this is to hang on the wall, where will the dual rear port slots exit?

As sreten said, it'd "work" in the strictest sense, but perhaps not easy to model / predict performance. I'd be inclined to isolate the 2 slots and exit them at the bottom
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Old 28th March 2014, 10:24 PM   #4
Squeak is offline Squeak  Denmark
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Part of me thinks that the some of each ports output will be lost into the other. Another part of me thinks that is BS. After all it's somewhat the same as having a port rather close to a wall, which works fine if it is not too close.
Or it could be argued to be the same as one port that has a 90 degree bend right before the exit.

Last edited by Squeak; 28th March 2014 at 10:31 PM.
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Old 28th March 2014, 10:27 PM   #5
Squeak is offline Squeak  Denmark
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Quote:
Originally Posted by chrisb View Post
If this is to hang on the wall, where will the dual rear port slots exit?
It's a squashed quarter wave with the port(s) at the bottom of the "frame".

Quote:
As sreten said, it'd "work" in the strictest sense, but perhaps not easy to model / predict performance. I'd be inclined to isolate the 2 slots and exit them at the bottom
Just a feeling or do you have something facts/physics to back it up? Thank's for your input anyhow.

Last edited by Squeak; 28th March 2014 at 10:36 PM.
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Old 28th March 2014, 10:44 PM   #6
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You'll probably get some turbulence, but assuming you don't go mad with the vent aspect ratio it should work ~'good enough.' Sorry, just lost my dog (some form of cancer) so not really up to going into much detail.
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Old 28th March 2014, 10:49 PM   #7
Squeak is offline Squeak  Denmark
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I'm amazed you're even reading the forum. Welcome distraction? Losing a dog is for most people as bad as loosing a human. My condolences.

Last edited by Squeak; 28th March 2014 at 10:55 PM.
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Old 28th March 2014, 10:51 PM   #8
Squeak is offline Squeak  Denmark
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It leaves the question though, what is "good enough"?
If you lose efficiency or get interference, I'll just do it some other way.
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Old 29th March 2014, 01:16 AM   #9
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by Squeak View Post
It's a squashed quarter wave with the port(s) at the bottom of the "frame".


Just a feeling or do you have something facts/physics to back it up? Thank's for your input anyhow.
99% of my musings are conjecture, the remaining 15% intuition, and even I'm not wrong all the time.

I don't think the question in my previous post was answered, is this to be mounted flush to the wall with the binding posts at the rear?

If so how much clearance were you planning on?
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Old 29th March 2014, 02:57 AM   #10
GM is offline GM  United States
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Hmm, this appears to be an acoustic high pass filter, If so, instead of enhancing the bass it will damp it down instead: Acoustics/Filter Design and Implementation - Wikibooks, open books for an open world

GM
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