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Open Baffle Epiphany!

If you are, with a woofer crossed over low enough, the ridge around the face of the woofer should be of no consequence. If the frequency range of the driver played high enough to correspond to a frequency with a wavelength similar to the dimensions of the cutout, then I'd expect to see some frequency aberrations.

^pseudo techno babble. :)
 
Yes. Like the Alphas pictured above.....which are fixed to the rear of the baffle. If the intended design operating range of the driver is for LF content only...say up to 200 Hz (give or take 50 Hz)...is there a benefit to be had with the rear mount configuration? And what about rear mounted driver with a small hole in the baffle (around 5-6" dia.) for the driver to fire through...such as EP has employed in their designs. Is that a method of loading?
 
There are many levels of Techno Babble. Premium is high on the scale, Mega is the highest level. The only place I have ever saw Mega Techno Babble was in the Enable discussions and descriptions over at DIYAudio. Enable is some amazing fantasy food.
 
MJKing said:
There are many levels of Techno Babble. Premium is high on the scale, Mega is the highest level. The only place I have ever saw Mega Techno Babble was in the Enable discussions and descriptions over at DIYAudio. Enable is some amazing fantasy food.
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And yet like so many imaginary upgrades, there are a lot of people that claim it has transformed their listening experience and elevated it to highest levels.
 
kyle said:
And yet like so many imaginary upgrades, there are a lot of people that claim it has transformed their listening experience and elevated it to highest levels.
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That is true. It does make a difference, sometimes good sometimes bad. But it definitely does not do what they claim in the Mega Techno Babble. I have measured and listened to a pair of treated (by an expert) and untreated drivers and demonstrated them to a friend and the results were obvious and underwhelming, but this is getting off topic.
 
MJKing said:
That is some premium techno babble. My guess is the person who wrote that did not do the math involved in designing a bass reflex speaker. Don't blindly believe everything you read on the Internet.
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Fair enough. But would you humor a simple pig then and explain in laymans terms why this is not the case, or at least not an issue? Are the distances covered not significant enough to create a timing issue then? It would seem that the pathways that that rear wave has to travel when compared to the front wave would be longer in distance...or is this not the case at all? Or that the time it takes to cover these distances is not significant enough to be an issue? You will have to forgive me for not working through the math proofs on all of this, I left college a long long time ago...and even then I was not a strong math student.

Regards
Mister Pig
 
Back to epiphanies ( H-frames count too )

If you don't want to go full tilt OB the H-frames alone are worth the price of admission.

Entry level price for sure but not entry level performance. I've heard lots of subs but none gave the natural articulate bass these things do. You hear not just the note and the pluck of the string but the wood of the double bass.

picture.php
 
MJKing said:
That is some premium techno babble. My guess is the person who wrote that did not do the math involved in designing a bass reflex speaker. Don't blindly believe everything you read on the Internet.
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No Giga-techno babble? Nor Tera-techno babble?

Maybe even Google(plex)-tecnhno babble?

;-)

dnewma04 said:
kOBuki?
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Now, that. That right there is some good stuff. The Superbowl ad copywriters ain't got nothin' on that! :-)
 
MJKing said:
I think that should be another thread.
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Go for it, sir (and I am not being facetious)!

The best information at forums like this come from the true experts (and we're fortunate enough to have several experts, pro and am, posting at AK... and it's a good thing).
 
Shouldn't the planars be mounted at right angles ("portrait') relative to the photo you posted for best horizontal dispersion?
 
tomlinmgt said:
Yes. Like the Alphas pictured above.....which are fixed to the rear of the baffle. If the intended design operating range of the driver is for LF content only...say up to 200 Hz (give or take 50 Hz)...is there a benefit to be had with the rear mount configuration? And what about rear mounted driver with a small hole in the baffle (around 5-6" dia.) for the driver to fire through...such as EP has employed in their designs. Is that a method of loading?
Click to expand...

Anyone?
 
In the first example, no benefit other than cosmetic. In the next situation with the Emerald Physics, I believe they are attempting to alter the behavior of the cancellations by manipulating the forward/backward firing frequencies. I've never played it with it myself, but it's only used on the helper woofers. I'd be interested in learning more and taking some of my own measurements.
 
I agree with dnewma04 with respect to front or rear mounting, no impact at low frequencies.

I did look at the additional baffle with a small hole added to the front of an OB a while back. If my memory is correct the simulations did not show any big benefit, maybe even a degradation. I looked for the files and could not find them on my computer.

I would stick with the simple mounting the driver on the front of the baffle, simple usually wins out in the end.
 
This fellow Carolinian did the baffle-less speakers a few posts back. Now he's doing siamesed Grundigs over Heils I've got to pay him a visit.

more-ugly-speakers1.jpg
 
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