what is my boxed tuned to?

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ilikesound
ilikesound Posts: 355
edited September 2007 in Car Subwoofer Talk
i have an 8'' momo sub in a sealed box. i was wondering if i can find out the tuning frequency of my box. i have no idea how to do it though, can anyone help?
At Home:
Panasonic 42'' TC-L42U12 LCD
Pioneer VSX-80TXV
Toshiba HD-XA2
Sony PS3 - psn "metalguitars"
Xbox 360 - gamertag "giggidygiggidy"
Panamax 4300EX
Polk RTi8's
Polk CSi3's
Polk FXi3's. (x2)
Martin Logan Dynamo (x2)
Audioquest interconnects and wires.

Away From Home:
JVC HDR-50
stock system in new car for now:(
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  • Jethro
    Jethro Posts: 28
    edited August 2007
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    ilikesound wrote: »
    i have an 8'' momo sub in a sealed box. i was wondering if i can find out the tuning frequency of my box. i have no idea how to do it though, can anyone help?
    Sealed boxes do not have 'tuning frequencies' like ported boxes do. All subwoofer systems (woofer + enclosure) have 'resonant' frequencies, but is not something you necessarily need to tune.

    If you want to know the resonant frequency of a sealed sub system, then you need to know...

    1. The following Thiele-Small parameters of the sub:
    • Vas
    • Fs

    2. The total internal volume of airspace inside the enclosure (Vbox).

    Use the formula:

    [(Vas/Vbox)+1]^sqrt * Fs = Fc (resonant frequency)
    Friends don't let friends listen to Bose.
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  • ilikesound
    ilikesound Posts: 355
    edited September 2007
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    how do you find out how much volume the box has? is it HxWxD?
    At Home:
    Panasonic 42'' TC-L42U12 LCD
    Pioneer VSX-80TXV
    Toshiba HD-XA2
    Sony PS3 - psn "metalguitars"
    Xbox 360 - gamertag "giggidygiggidy"
    Panamax 4300EX
    Polk RTi8's
    Polk CSi3's
    Polk FXi3's. (x2)
    Martin Logan Dynamo (x2)
    Audioquest interconnects and wires.

    Away From Home:
    JVC HDR-50
    stock system in new car for now:(
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  • MacLeod
    MacLeod Posts: 14,358
    edited September 2007
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    http://www.carstereo.com/help/Articles.cfm?id=26
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