Horn enclosure for Altec 604 Coaxial - diyAudio
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Old 31st May 2004, 04:26 PM   #1
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Smile Horn enclosure for Altec 604 Coaxial

Hello,
I'm designing a horn cabinet for a pair of new 604-8k.

Please take a look at the Image attached and please post your comment, this is only a concept I'm not really sure how it would sound or if it will be better than a bass reflex enclosure.


Sincerely

Eric


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Old 31st May 2004, 04:31 PM   #2
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Default The Image

There is the pic
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Old 31st May 2004, 07:21 PM   #3
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Wouldn't you need a more defined compression chamber?

I like that it is non parallel, but the transition from the compression chamber to the throat of the horn would have to be more abrupt, no?

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Old 31st May 2004, 08:47 PM   #4
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The concept is fine but you don't need to go to the trouble of using curved surfaces with a rear loaded horn. Curved bends are critical to smooth response above 300-400 Hz or so, but those aren't the frequencies that your horn will be passing. With the long wavelengths that the rear loaded horn passes curved surfaces are of no advantage. They don't hurt, but they don't help either.
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Old 31st May 2004, 10:03 PM   #5
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Iím using it curved because I'm planning to build the enclosure in MDF layers and sandwich them together the only problem will be the weight.
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Old 1st June 2004, 02:23 AM   #6
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That's fine. although you may find bending MDF a major chore. Curved surfaces have the advantage of being very vibration resistant, but you still may find the effort not worth the benefit.
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Old 1st June 2004, 04:44 AM   #7
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>Wouldn't you need a more defined compression chamber?

I like that it is non parallel, but the transition from the compression chamber to the throat of the horn would have to be more abrupt, no?
====
For the appropriate BW, no, no. What matters is net Vb, St. That said, if the drawing is reasonably accurate, the rear chamber is much too large, St too small, and the pathlength way too short to perform well. Better to stick it in a tweaked 825/828 design, or probably best, a chopped down 210/211 with a 416 helper woofer. A pair of these would suffice for an art house cinema.

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Old 1st June 2004, 01:31 PM   #8
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where can I find the 825/828 design and the 210/211 design
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Old 1st June 2004, 03:01 PM   #9
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http://www.lansingheritage.org/html/...970s-plans.htm

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