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Multi-Way Conventional loudspeakers with crossovers

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Old 20th February 2004, 06:26 PM   #1
alex_g is offline alex_g  United States
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Default Box shape

Guys,

Another question.

Box shape for sub.

Never build a cube shaped box, which is the absolute worst enemy of a smooth frequency response curve
http://www.loudspeakers101.com/BoxCalc.htm

Is it so critical? I read on many forums that box shape is not so important and I was going to make 15X15X15.
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Old 20th February 2004, 07:37 PM   #2
Svante is offline Svante  Sweden
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Default Re: Box shape

Quote:
Originally posted by alex_g
Guys,

Another question.

Box shape for sub.

Never build a cube shaped box, which is the absolute worst enemy of a smooth frequency response curve
http://www.loudspeakers101.com/BoxCalc.htm

Is it so critical? I read on many forums that box shape is not so important and I was going to make 15X15X15.

That is debatable... On the one hand, bulding a cubic box, all first order standing waves will coincide and have a maximal effect. On the other hand, if you make your box a cube with the side 15 inch, the first standing wave will occur at ~450 Hz. If this is a sub, you will have filtered out this frequency properly anyway.

Using another ratio will undoubtedly lower one of the three first standing wave frequencies and make the problem worse.
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Old 20th February 2004, 07:42 PM   #3
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Quote:
Never build a cube shaped box
Never say never.
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Old 20th February 2004, 08:18 PM   #4
SY is offline SY  United States
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For a sub, make it rigid and don't sweat the shape.
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Old 20th February 2004, 08:32 PM   #5
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Quote:
Originally posted by SY
For a sub, make it rigid and don't sweat the shape.

I agree. However, for a "bass module" that will reach above the midbass, shape is a consideration.
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Old 20th February 2004, 08:35 PM   #6
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The frequencies of the sub don't care about what the enclosure looks (feels?) like since they're so low. However, when you get into the higher frequencies, cylinders and cubes start hurting.
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Old 20th February 2004, 08:35 PM   #7
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do some research on sonotube subwoofers, theyr pretty cool.
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Old 21st February 2004, 03:43 AM   #8
Jye is offline Jye  Australia
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Im totally with Sean on sonosubs, Ive made one and I am really happy with the results. You can check out my webpage for some pics and the link below gives heaps of great examples.

http://members.tripod.com/~terrycthe...um/page12.html
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