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Old 2nd January 2007, 08:41 AM   #1
Hayden is offline Hayden  Australia
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Join Date: Aug 2004
Location: Mackay Australia
Default would half box volume work?

I would like a smaller box I know the recommend volume is best but if I half the box volume on any sub wouldnít that double the resonate frequency?
I havenít a clue in this area so how does that work?


Some specs of the sub.
Qts: .234
Vas: 185.60
Fs: 21.40
Re: 2.050
Le: 3.25
Z: 4.00 ohm
Qms: 8.838
Qes: .240
Spl: 90.83
Bl: 31.41774
Dd: 42.62cm
Sd: 1426.0 cm2
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Old 2nd January 2007, 10:47 AM   #2
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Download one of the many box modelling programs and have a play.
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Old 2nd January 2007, 01:28 PM   #3
Hayden is offline Hayden  Australia
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Location: Mackay Australia
I have winISD pro would that work?
I found this one http://www.geocities.com/f4ier/newsubsim.htm
How accurate is this? Or do you recommend a specific one?
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Old 2nd January 2007, 02:38 PM   #4
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WinISD is fine, I prefer Unibox, but it's a little more complicated.
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Old 4th January 2007, 02:15 AM   #5
Hayden is offline Hayden  Australia
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Thanks for the info, Iíll do more research by reading and software and see what I come up with.
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Old 21st January 2007, 10:59 AM   #6
Hayden is offline Hayden  Australia
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Location: Mackay Australia
Hi hate to say this but I donít know much about the real technical terms of speakers but I loaded a soloX 18Ē into winISD PRO and set the sealed box at 2cuf it loses 3db around 10-20hz I have no idea but will this effect the sound that much?

To me I donít understand the program because you add mass to the cone and you get a db rise over the frequency response doesnít make sense to me.

I have limited space I canít go much bigger than about 3cuf sealed or ported box
Will I lose much power?
The sub requires a 6 cu.ft. sealed and 5 cu.ft. ported

Any help will be greatly appreciated
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