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Reload Thread: Get Your SPL Related Questions Answered Here!

  1. #46
    bigbassman's Avatar
    bigbassman is offline Master of all things loud bigbassman is a Supporting Member of the forum!



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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by jbl_marshall21
    alright heres a good question, i think. i'm not sure how to say this but i'll give it a shot.

    lately i have been trying out some tones and things w/o a mic. is there a point were turning the volume up so much would cause flexing on the vehicle, which would make it not be as loud as a lower volume, but by keeping the volume down, stop the flexing?
    nope..

    Loyd L.



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  2. #47
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by kickerlivinloud
    KK, new question. Should I brace my box on the outside or the inside??? I don't want my box to be huge so if I can save some air inside I am going to do it. Just cerious if that has any affect on the sound or anything....


    Thanks...

    Jon
    outside with wooden bracing

    inside with all thread ONLY.. ever..

    Loyd L.



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  3. #48
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by TooLowTooGo
    ok i asked this in a thread aswell just incase. so if its not answered there maybe it will be answered here, i hope.

    Distortion
    ok Distortin, yes it is bad for a sub....real bad. buuuuut will distortion in SPL give u a higher DB?
    what im saying is if u crank the volume n etc.... all the way up where u kno theres distortion, will it lessen ur db rating or higher it because its still louder?
    50% clip is the limit of gain in my testing..

    never turn the headunit or gain all the way up...

    set it properly

    Loyd L.



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  4. #49
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by Puggsley456
    Do you think it would be wise for me to take the seat right out and jump to another class?
    Or just flip the box facing forward and seal it off?
    either way can work.. but without testing both methods.. I can't tell you which will do better in your install .. sorry

    Loyd L.



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  5. #50
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    Re: Get Your SPL Related Questions Answered Here!

    Bracing the inside of a sealed fiberglass box ... any suggestions?

    - Steve



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    Quote Originally Posted by DJGTSR
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  6. #51
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by packerfan
    What are some tricks for walls?
    extremely thick woofer baffles (depth of the woofer or more)

    sand in between layers of MDF

    lots of all thread bracing

    corner slants in all 90 degree angles

    resin in the box

    rounding the entrance and exit of the port, or using PVC pipe over them

    Loyd L.



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  7. #52
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by TooLowTooGo
    last one i competed in was near the kicker panel. next one is on the 1st n thats goin by dash.
    but no comps aroun here are illegal, all legal. so wich u think is better?
    CRX style

    Loyd L.



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  8. #53
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by supa_c
    i have a Q. in my burb would it be better to fold down the 2nd row seats for more db. the box is facing the back with no carpet on the tailgate(fell off). maby put a sheet of mdf over the folded seats so the carped doesnt absorb the waves ? just wonderin.
    yes, fold all the seats down you can... and fold the front seats forward

    throwing a sheet of wood over the seats won't do much, if anything.. and will most likely disqualify you from most events

    Loyd L.



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  9. #54
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by ss3079
    Bracing the inside of a sealed fiberglass box ... any suggestions?

    - Steve
    more fiberglass

    or wood will do fine too

    Loyd L.



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  10. #55
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    Re: Get Your SPL Related Questions Answered Here!

    whew.. sorry took so long for me to reply

    Loyd L.



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  11. #56
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by bigbassman
    more fiberglass

    or wood will do fine too

    Loyd L.


    It'll be thick, don't worry.

    I'm glad to hear that I can use wood inside.

    - Steve



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    Quote Originally Posted by DJGTSR
    I dont mean to be rude, but what is the highest level of education that you finished?

  12. #57
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by ss3079

    I'm glad to hear that I can use wood inside.

    - Steve
    yup.. alot of people (including yours truly) build a frame out of wood, and after several layers of glass are laid.. drill and screw down cross members inside.. then continue glassing.. to cover the screw holes

    Loyd L.



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    Re: Get Your SPL Related Questions Answered Here!

    I wouldn't have thought to do it that way ... good ... because I haven't done the front yet

    - Steve



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    Quote Originally Posted by DJGTSR
    I dont mean to be rude, but what is the highest level of education that you finished?

  14. #59
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    Re: Get Your SPL Related Questions Answered Here!

    Quote Originally Posted by bigbassman
    either way can work.. but without testing both methods.. I can't tell you which will do better in your install .. sorry

    Loyd L.
    I have now tried both set ups and i am havin trouble seeing a real difference. Maybe you guys can help I dont know why I didnt see more of an increase? With the seats up on the termlab mic I got a 138.6 but with the seats unbolted and folded down on the termlab sensor I only hit a 139.0

    And because of the seats being unbolted i was in SS1-2. So next time my box is going on my back seat. Thats how the first place guy in my class had it! I wish I had known!



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  15. #60
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    Re: Get Your SPL Related Questions Answered Here!

    Hello....

    I have a ford explorer and am testing a couple different boxes.....
    currently I am building a "crx" box, 29x29x14, 4 4" aero's....

    Do you think I could gain anything by smoothing the edges on the inside, maybe cutting some wood to make 45deg angles instead of 90deg's on the inside...?



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