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Old 7th April 2006, 08:43 AM   #1
matos81 is offline matos81  Italy
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Default low VAS sealed better than high VAS?

Hi, I discovered a woofer very good for a sealed music subwoofer:

FS: 23Hz
Qts: 0,48
VAS: 275 L (very high)

WINISD says to built a 230L box.
It's a subwoofer, so for 40-100Hz I think a Qtcof 0,85 it's good, allowing a smaller 120L box.

So, are any musical advantages to use a woofer with low VAS in a 30L box insted of high VAS woofer in a 130L?
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Old 7th April 2006, 09:25 AM   #2
Did it Himself
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Not really. The only reason you might want a bigger box is if you intend to vent the design and you need to tune low (requires long vent which may be impractical in a small box).

Some may argue that the low VAS drive unit has stiffer suspension so is better damped, but again this is false as all that matters is the overall in-box performance.
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Old 7th April 2006, 09:35 AM   #3
matos81 is offline matos81  Italy
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Thank you.

However I don't want a bigger box, a big box is needed for the woofer specifications. :P
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Old 7th April 2006, 11:28 AM   #4
sreten is offline sreten  United Kingdom
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Default Re: low VAS sealed better than high VAS?

Quote:
Originally posted by matos81

So, are any musical advantages to use a woofer with low
VAS in a 30L box insted of high VAS woofer in a 130L?
Hi,

All things being equal the performance would be very similar,
however the bigger box would be more efficient, that is you
are trading compactness for efficiency.

/sreten.
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