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Old 26th December 2011, 02:17 PM   #1
thefox is offline thefox  United Kingdom
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Default box volume for sub

got two monacor sph 165c drive units spec haer SPH-165C - Monacor HiFi bass-midrange speaker 100Wmax 8Ω - Europe Audio want to build a sub using both drive units in a closed box but not sure what box volume to use or driver placement any help would be useful cheers gareth
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Old 26th December 2011, 04:39 PM   #2
RS232 is offline RS232  United Kingdom
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Rec. net cabinet volume
Closed 8 l
Bass-reflex 16.5 l
Is on the description from your link
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Old 28th December 2011, 06:21 PM   #3
thefox is offline thefox  United Kingdom
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is it the same volume if you use two drive units in the same box cheers gareth
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Old 28th December 2011, 09:57 PM   #4
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No, it's per driver. Have you modeled this in WinISD or the like?
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Old 29th December 2011, 12:52 PM   #5
thefox is offline thefox  United Kingdom
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no its me first sub
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Old 29th December 2011, 03:25 PM   #6
johnr66 is offline johnr66  United States
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I ran them through WinISD. It recommends ported. Sealed, it wants 15 liters for two drivers. F3 is 66Hz, so not a low playing sub. Better to port, but port would be way too long for the cab. You would have to use a wrap around slot design. Some quarter wave topology might work if you have the space.

Much better to put a good 25cm driver in a 30L sealed cab for a good entry level compact sub.
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