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- Thread starter Vivek
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By the way, I'm sure someone will go into mention about the golden ration a little later

If you want your height to be 20 cm, and your depth to be 60 cm with a volume of 48000 cm^3, your equation would be

20 * 60 * X = 48000, which would give you a width of 40 cm to meet the necessary volume.

As long as your internal volume stays the same, you should have no problem. Just make sure to compensate for any added bracing, the volume the drivers occupy, and for extremeists, any stuffing or lining you use. Also make sure that if the enclosure is ported, that the port length doesnt exceed the internal dimensions of the box. Good luck!

Bryan

The "Golden Ratio" has the dimensions being x, 0.707x and 1.414x. A cabinet that measures 7" x 10" x 14" is an example of this. NOTE: It doesn't matter which of the numbers is height, width or depth.

Good luck.

Grey

Sorry, I think you've made a mistake there...

x, 0.707x and 1.414x doesn't look like a golden ratio.

Mode orders B & C are multiples - this would give you bad standing waves.

There are many 'golden ratios' - some obviously more practical than others.

x, 1.6x, 2.3x is a good one.

Interestingly these golden ratios make good listening room proportions too (for obvious reasons).

Simon

Simon said:Thoth

Sorry, I think you've made a mistake there.

There are many 'golden ratios' - some obviously more practical than others.

x, 1.6x, 2.3x is a good one.

Interestingly these golden ratios make good listening room proportions too (for obvious reasons).

Simon,

You're right. I remembered the WRONG golden ratio. There are several RIGHT golden ratios, some of which are based on the Fibonacci series. Sorry, my mistake.

I checked my archives, and found the following possibilities, all of which should work fairly well for speaker enclosures:

x, 1.14x, 1.39x

x, 1.26x, 1.59x

x, 1.28x, 1.54x

x, 1.60x, 2.33x

x, 1.62x, 2.62x

If there are multiple sealed compartments within the enclosure, this applies to those compartments, individually. The goal for using enclosures with the golden ratio is that a frequency that will resonate in one direction is unlikely to resonate in another direction (no standing waves). Obviously, as the frequency gets higher, this becomes less likely to be true. On the other hand, as the frequency gets higher, there is less likelyhood that the driver for that frequency will use the enclosure as a resonant chamber, and a greater likelyhood that the speaker stuffing will absorb that frequency.

Grey is also right that sloped sides make this unnecessary. What he didn't say is that the speakers require better woodsorking tools and skills. Also, for many of us, these enclosures would have a lower SAF (Spouse Acceptance Factor).

http://members.home.net/exquisiteaudio/wilsonwattclones.htm

Heres another link to a pair of WW clones

http://www.users.nac.net/markowitzgd/david/david.htm

Using a sloped baffle can also help align the center of the drivers, and as mentioned earlier, it can nearly eliminate standing waves. I've also seen a pair of speakers made using an angle-cut piece of PVC, I'll see if I can dig up the link a little later.

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