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    Which SPL Design?

    I'm building an SPL box for 2 12 cvr's in a 06 Impala. He wants the port to face into the cabin. Sd of both subs is ~165 sq in.

    I've been told to use up to 100% of Sd.

    Here is where I'm running into some difficulties. Both subs and 165 sqin of port can't fire into the cabin. There isn't enough room. The most port area I can get is ~65 sq in this way.

    If I tweak the placement of the subs, I can get all 165 sq in of port firing into the cabin. This requires me to place one of the subs on the side and one facing into the cabin. I worry about phase issues with this but those may be negated by the sheer amount of port area. I also wonder whether having both subs facing into the cabin will make much of a difference than moving one to the side.

    Have a quick look at the designs and tell me which is better suited for his application.



    Both these are 3.5 cubes at 48hz.



    Ride: 1993 Mazda MX-3
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    Sub Stage: TC Sounds LMS-R 15 Dual 2 in 4 cuft. box tuned to 24hz
    Front Amp: Precision Power PC2400.2. 100rms x 2 at 4 ohms
    Sub Amp: Powerbass XA 1500d. 1500rms x 1 at 1 ohm
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    Re: Which SPL Design?

    Im no expert but I dont think the first one would be a good idea.



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    Re: Which SPL Design?

    how tall is the front of the box mabe you could stagger the subs




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    Re: Which SPL Design?

    first one is terrible idea. bad phasing issues and cancelation with the port being L'ed off and the subs being not on same plane. SPL is straight foward. just face them both foward and do 25 inches of port area for straight spl burp box. do 3.5-4 cubes with 90-100 inches of port.




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    Re: Which SPL Design?

    The box is only 16 inches tall. The 2nd design incorporates staggered subs. I'll only have 65 sq in of port. 90-100 is out the question.



    Ride: 1993 Mazda MX-3
    HU: Alpine CDA-9853 with KCA-420i iPod Interface
    Front Stage: Pioneer Premier TS-D602P
    Sub Stage: TC Sounds LMS-R 15 Dual 2 in 4 cuft. box tuned to 24hz
    Front Amp: Precision Power PC2400.2. 100rms x 2 at 4 ohms
    Sub Amp: Powerbass XA 1500d. 1500rms x 1 at 1 ohm
    Refs:
    Sold to: 99StangGt, Kagymp5, DMDAKOTA, Snozzer, spljunkiems, jblanford, 98dodgestratus, stishdr, kombat96
    Bought from: allenzo, BreakMyWallet, pickup1, defj, select127

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    Re: Which SPL Design?

    u can get a bigger box than that in a 06 impala. u must be doing somehting wrong.




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    Re: Which SPL Design?

    The max dimensions are 32w x 32d x 16h



    Ride: 1993 Mazda MX-3
    HU: Alpine CDA-9853 with KCA-420i iPod Interface
    Front Stage: Pioneer Premier TS-D602P
    Sub Stage: TC Sounds LMS-R 15 Dual 2 in 4 cuft. box tuned to 24hz
    Front Amp: Precision Power PC2400.2. 100rms x 2 at 4 ohms
    Sub Amp: Powerbass XA 1500d. 1500rms x 1 at 1 ohm
    Refs:
    Sold to: 99StangGt, Kagymp5, DMDAKOTA, Snozzer, spljunkiems, jblanford, 98dodgestratus, stishdr, kombat96
    Bought from: allenzo, BreakMyWallet, pickup1, defj, select127

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    Re: Which SPL Design?

    You could do a sort of clamshell design to get more port area in there with the subs and port on the same side of the box.



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    Re: Which SPL Design?

    Do you happen to have an example of that design?



    Ride: 1993 Mazda MX-3
    HU: Alpine CDA-9853 with KCA-420i iPod Interface
    Front Stage: Pioneer Premier TS-D602P
    Sub Stage: TC Sounds LMS-R 15 Dual 2 in 4 cuft. box tuned to 24hz
    Front Amp: Precision Power PC2400.2. 100rms x 2 at 4 ohms
    Sub Amp: Powerbass XA 1500d. 1500rms x 1 at 1 ohm
    Refs:
    Sold to: 99StangGt, Kagymp5, DMDAKOTA, Snozzer, spljunkiems, jblanford, 98dodgestratus, stishdr, kombat96
    Bought from: allenzo, BreakMyWallet, pickup1, defj, select127

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    Re: Which SPL Design?

    Quote Originally Posted by matt_martin87 View Post
    Do you happen to have an example of that design?
    (not mine)
    http://img175.imageshack.us/img175/1...ellorvshap.jpg



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    Re: Which SPL Design?

    I'd be interested if I knew anything about designing them.



    Ride: 1993 Mazda MX-3
    HU: Alpine CDA-9853 with KCA-420i iPod Interface
    Front Stage: Pioneer Premier TS-D602P
    Sub Stage: TC Sounds LMS-R 15 Dual 2 in 4 cuft. box tuned to 24hz
    Front Amp: Precision Power PC2400.2. 100rms x 2 at 4 ohms
    Sub Amp: Powerbass XA 1500d. 1500rms x 1 at 1 ohm
    Refs:
    Sold to: 99StangGt, Kagymp5, DMDAKOTA, Snozzer, spljunkiems, jblanford, 98dodgestratus, stishdr, kombat96
    Bought from: allenzo, BreakMyWallet, pickup1, defj, select127

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