A speaker physics question.

Can someone explain why I would want to build a rear horn loaded enclosure verses a tuned reflex port? Why not horn load both the front and back of the speaker with mirror horns? I've made a sketch. Just need to build a big wood steamer and make some curved plywood. :)

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Originally Posted by VolvoHeretic

Can someone explain why I would want to build a rear horn loaded enclosure verses a tuned reflex port? Why not horn load both the front and back of the speaker with mirror horns? I've made a sketch. Just need to build a big wood steamer and make some curved plywood. :)

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Horn loading the back increases efficiency. Problem is as I have already stated severe phase issues.

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Originally Posted by cradeldorf

Apparently you never met my ex wife and her two sisters. :D

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You simply misstated the problem is why you got wrong info. In your case two large mouths became one huge one. The effect is drastically increased by proximity just as I said.:D

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Originally Posted by cradeldorf

Ok just to be on the same wavelength, by flat response do you mean that all the frequency's are coming out at the same volume or decibel? I understand the phase part...I think.

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http://www.hostboard.com/forums/hbmc.../2011/09/1.gif

One pure sound a fraction of a second after the next

http://www.hostboard.com/forums/hbmc.../2011/09/2.gif

Sum of two waves slightly out of phase

Essentially with out of phase issues some frequencies will add, others will cancel. The result is exaggerated peaks and dips. This is why the enclosure can not exhibit smooth response over a wide band.

I'm gonna work on a drawing of an infinite baffle design, I'll post it up when I get it done, what I really want to do is get rid of the boxy sound that seems to be so common in enclosures.And have a nice clear open sound...only with thundering bass. :/

Edit, Sorry I meant Open Baffle.

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Originally Posted by cradeldorf

I'm gonna work on a drawing of an infinite baffle design, I'll post it up when I get it done, what I really want to do is get rid of the boxy sound that seems to be so common in enclosures.And have a nice clear open sound...only with thundering bass. :/

Edit, Sorry I meant Open Baffle.

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I beleive the only real way to do that is with an infinite baffle....... driver mounted in wall/ceiling/floor/etc.

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Originally Posted by Audio_by_Goodwill

I beleive the only real way to do that is with an infinite baffle....... driver mounted in wall/ceiling/floor/etc.

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Abe did it and he says their wonderful sounding. Check out this link.
http://www.hostboard.com/forums/f700...04-8g-obs.html

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Originally Posted by cradeldorf

Abe did it and he says their wonderful sounding. Check out this link.
http://www.hostboard.com/forums/f700...04-8g-obs.html

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Maybe our definitions of thundering bass are different? Certainly an open baffle is possible, but bass response is their downfall.

I think that thread got messed up in a transfer when the forum changed. The first post or so seems to be gone.

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Originally Posted by Audio_by_Goodwill

.....I think that thread got messed up in a transfer when the forum changed. The first post or so seems to be gone.

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I hope no other threads/posts got messed up or deleted when the forum changed--I really consider the info/history here to be invaluable and some of it is irreplaceable. Anyone else notice any discrepancies/deletions?

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Originally Posted by voice of the theater

I hope no other threads/posts got messed up or deleted when the forum changed--I really consider the info/history here to be invaluable and some of it is irreplaceable. Anyone else notice any discrepancies/deletions?

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I've noticed a few that seemed to get chopped up. I think it was the prior change in the forum, not the most recent one. If you notice none of the codes work either.

I've been seeing a lot of this stuff in old posts......... <font size="2" face="Verdana, Helvetica, sans-serif">