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Old 4th October 2012, 01:47 AM   #1
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Default Can a larger sealed box be detrimental?

Going to put a pair of Tempest X2-15" in sealed boxes. Manufacturer indicates that a larger sealed box is a better sealed box...

It seems to make sense for me, to put them in ~13 cu. ft. boxes, for various logistical reasons (not sound quality related). Manufacturer does not say what happens beyond 8 cu. ft.

Is there any detrimental effect due to putting a sub in a larger sealed box?

Thank you.
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Old 4th October 2012, 02:03 AM   #2
sreten is offline sreten  United Kingdom
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Hi,

A pair in a 13cuft box seems fair enough for a 9 cuft Vas driver.
Qbox will be about 0.65, a very well stuffed box about 0.6.
-3dB around 33 Hz.

rgds, sreten.
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Last edited by sreten; 4th October 2012 at 02:13 AM.
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Old 4th October 2012, 02:12 AM   #3
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Thank you sreten. I meant two subs, each in a ~13 cu. ft. sealed cabinet.
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Old 4th October 2012, 02:21 AM   #4
sreten is offline sreten  United Kingdom
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Hi,

You will gain next to nothing by going over 9 cuft per driver.
But then again if 13 cuft is convenient, there is nothing lost.

rgds, sreten.
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Old 4th October 2012, 02:53 AM   #5
Einric is offline Einric  United States
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You may gain sloppy bass with a large cabinet.
The sealed box acts like a spring pulling back on the cone (or pushing on the in-swing).
Without that resistive pressure both directions you are relying more on the driver's suspension and can run into damaging the suspension system on the driver.
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Old 4th October 2012, 01:44 PM   #6
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Einric

I believe this is incorrect. Drivers in an oversized sealed enclosure are considered over damped. The "air spring" inside a sealed enclosure can help to control excursion, but does prevent it from being "sloppy".
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