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    gumby688's Avatar
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    Best for spl

    ok finishing up a new box for my explorer it has a cabin peak of 46 hz tuned the box to 35.5 hz. Where am I gonna see my best spl at both for burps and music (new format for scoring is 1st run burps and second run 30 sec music avg then added together) somewhere in the middle of 35.5 and 46 maybe like 40hz?



    Clarion CX-501 HU
    Rockford Fosgate Punch 400-A4 on
    RF T1 power T152 and T1682 in front doors.
    DDm4 on 2 ZV3 18's





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    Re: Best for spl

    well now I guessed someone would have an ideal



    Clarion CX-501 HU
    Rockford Fosgate Punch 400-A4 on
    RF T1 power T152 and T1682 in front doors.
    DDm4 on 2 ZV3 18's


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    Re: Best for spl

    I think 40 would be okj I always thought that 50hz was better for spl to avoid speaker damage but I dont do competions so I figured I'd give opinion but as far experience with it Im sure if you give it a little bit some one will guide you.




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    Re: Best for spl

    you can't just guess. you need to do a sweep on a TL and find where it peaks. then burp at that freq and a few cycles above and below it to find your loudest freq. then find a song that has 30+ seconds of that freq




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    Re: Best for spl

    Quote Originally Posted by mlstrass View Post
    you can't just guess. you need to do a sweep on a TL and find where it peaks. then burp at that freq and a few cycles above and below it to find your loudest freq. then find a song that has 30+ seconds of that freq
    Not rocket science




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    Re: Best for spl

    if you dont have a meter to work with and go to the comp i would try 44-45-46-HZ burps in the 30 second. If it a 2x or 3x event use track #4 on the TNESPL disc- you have to use it anyway on those events. What show are you going to? are you in rookie 1 or 2?




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    Re: Best for spl

    Quote Originally Posted by NASTY08IMPALA View Post
    Not rocket science
    your kind of a know-it-all prick aint ya




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    Re: Best for spl

    Quote Originally Posted by SMS View Post
    your kind of a know-it-all prick aint ya
    Not at all......just stating facts .go to a **** event and get there early and clinic ...clinic.is.free if.ur.a member do a full sweep find ur peak ..and burp a few tones above and below it then for ur music avg jus find a song with ur peak freq.




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    Re: Best for spl

    Quote Originally Posted by SMS View Post
    if you dont have a meter to work with and go to the comp i would try 44-45-46-HZ burps in the 30 second. If it a 2x or 3x event use track #4 on the TNESPL disc- you have to use it anyway on those events. What show are you going to? are you in rookie 1 or 2?
    Will be at the show on may 5th in New Bedford,MA with 6 12's I will be in rookie 2 I think.



    Clarion CX-501 HU
    Rockford Fosgate Punch 400-A4 on
    RF T1 power T152 and T1682 in front doors.
    DDm4 on 2 ZV3 18's


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    Re: Best for spl

    Quote Originally Posted by gumby688 View Post
    Will be at the show on may 5th in New Bedford,MA with 6 12's I will be in rookie 2 I think.

    Subs, box, and vehicle will all come into play. Assuming you're set on subs, you should model them out in a box and see where various tunings put your peak. Assuming your box is already made and you're not changing subs right away, the best you can do is meter some test tones and see what does best.

    I'll have that RF built up by this weekend, if you want to swing up to Wilton, we can do some metering this weekend and you can pick it up.




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    Re: Best for spl

    Quote Originally Posted by hispls View Post
    Subs, box, and vehicle will all come into play. Assuming you're set on subs, you should model them out in a box and see where various tunings put your peak. Assuming your box is already made and you're not changing subs right away, the best you can do is meter some test tones and see what does best.

    I'll have that RF built up by this weekend, if you want to swing up to Wilton, we can do some metering this weekend and you can pick it up.
    Oh you have a tl or something? that would be sweet PM me what I owe ya on that rebuild and I will try to make it up there this weekend.



    Clarion CX-501 HU
    Rockford Fosgate Punch 400-A4 on
    RF T1 power T152 and T1682 in front doors.
    DDm4 on 2 ZV3 18's


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    Re: Best for spl

    Quote Originally Posted by gumby688 View Post
    Oh you have a tl or something? that would be sweet PM me what I owe ya on that rebuild and I will try to make it up there this weekend.
    I have a meter and WT3 (for doing impedance sweeps and TS parameters). Gotta get to work now, TTYL




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    Re: Best for spl

    Quote Originally Posted by gumby688 View Post
    Will be at the show on may 5th in New Bedford,MA with 6 12's I will be in rookie 2 I think.
    no, you cant have 6- 12s in rookie, you will be in like woofercooker 3, i think. you will be burping. anyway though i shall see you there. Im in rookie 1 this season with one of hispls sigs and a 20.1.




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    Re: Best for spl

    yeah thought I may have little too much for rookie with 6 12's and 4k watts



    Clarion CX-501 HU
    Rockford Fosgate Punch 400-A4 on
    RF T1 power T152 and T1682 in front doors.
    DDm4 on 2 ZV3 18's


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    Re: Best for spl

    Quote Originally Posted by SMS View Post
    no, you cant have 6- 12s in rookie, you will be in like woofercooker 3, i think. you will be burping. anyway though i shall see you there. Im in rookie 1 this season with one of hispls sigs and a 20.1.
    This is true. Cone area for amateur in NESPL maxes out @ 360" ^2. By the way, what coil do we have in that 12 of yours? Dual 1.4 or 2.8?

    Quote Originally Posted by gumby688 View Post
    yeah thought I may have little too much for rookie with 6 12's and 4k watts
    Yep. Limit is 3 12's and 2KW and odds are you won't keep the box under the window line so you'll be right up in Pro no-wall




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