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    sub out of tune

    recently i made a box for my diamond D6 sub. internal dimensions are 38.5 x 12.5 x 8.5, which brings it to 2.1 after sub displacement. i put a 3", 9.25" long tuning it to about 28 hz. this is WAY too low for this sub. I barely hear any notes besides the real low ones. put my ear up to the speaker, and it was making like a squeeking noise when its supposed to hit, but doesnt. I'd prolly do alot of damage if i continued it like this.

    which bring me to my next question: i love how ported boxes sound, so can anybody tell me what tuning range this sub likes (for the most flat response), and how much to trim the port, or is there a way to seal off the box to make a small sealed box? i really dont wanna trash this box and make another one, but i guess i could if all else fails.

    thanks in advanced,
    kev



    01 Acura CL

    Eclipse CD3200
    Rainbow SLC 265 Active
    Sundown: SAX-50.4D
    ..............SAE-1000D
    Diamond D6 10" d2 sub
    ...........-.80 cu. ft FG sealed




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    Re: sub out of tune

    make a new one


    its cheaper thatn ptentialy destroying your speaker.

    Robin



    www.BassHeadsENT.net for all your custom enclosure needs
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    Re: sub out of tune

    i need a picture of this box so i can figure out whats going on...



    CAF refs: Faulkton, Megalomaniac, Negativezeroz, boomer, dipitydoo, 93 saturn sl2, bjfish11, netherland24 & scotthulbs
    SiN refs: Josh99ta, Derek, crzystng, MrSector9, Sinister Audio

    Quote Originally Posted by faulkton View Post
    when i was in the army i would punch more bitches before breakfast than most people would punch all day.

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    Re: sub out of tune



    minues the back plate



    01 Acura CL

    Eclipse CD3200
    Rainbow SLC 265 Active
    Sundown: SAX-50.4D
    ..............SAE-1000D
    Diamond D6 10" d2 sub
    ...........-.80 cu. ft FG sealed

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    Re: sub out of tune

    wierd... i don't see any obvious construction errors... and 400 watts in 2 cubes shouldn't hurt that sub..

    i'm unsure of what could cause problems like what you're describing...

    does the sub sound regular outside of the box?
    when you press straight down on the cone does it rub at all?
    do you have access to a DMM? if so check out the voice coils...



    CAF refs: Faulkton, Megalomaniac, Negativezeroz, boomer, dipitydoo, 93 saturn sl2, bjfish11, netherland24 & scotthulbs
    SiN refs: Josh99ta, Derek, crzystng, MrSector9, Sinister Audio

    Quote Originally Posted by faulkton View Post
    when i was in the army i would punch more bitches before breakfast than most people would punch all day.

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    Re: sub out of tune

    thats a 12, right?



    that isnt very much port area imo



    www.BassHeadsENT.net for all your custom enclosure needs
    Offering build service and expertise in the Tampa area as well as enclosures shipped nationwide!
    Robin@BassHeadsENT.net


    Check this thread for all the build logs being posted.
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    Re: sub out of tune

    espically for such a large box.



    www.BassHeadsENT.net for all your custom enclosure needs
    Offering build service and expertise in the Tampa area as well as enclosures shipped nationwide!
    Robin@BassHeadsENT.net


    Check this thread for all the build logs being posted.
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    Re: sub out of tune

    the sub is perfectly fine, its brand new. I think since its tuned too low for it (only a 10"), so heres how im gonna describe it. When the lower drum notes that are supposed to hit, dont, the sub kinda makes a squeek/ rattling noise. when it gets to a real low note (late nite tip for example, it get amazingly low and sooo much output, enough to shake the car on higher volumes.
    Playing Incubus "circles", for example , i get port noise and missing ALOT of the notes, except the real low notes. Im still scratchin my head, but im keyin in that box is not tuned properly for that sub. Diamond recomends tuning it to 35 hz @ 1.25 cu ft slot port....



    01 Acura CL

    Eclipse CD3200
    Rainbow SLC 265 Active
    Sundown: SAX-50.4D
    ..............SAE-1000D
    Diamond D6 10" d2 sub
    ...........-.80 cu. ft FG sealed

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    Re: sub out of tune

    ^ i've put bigger in smaller lol...

    it shouldn't be making squeeking noises, and it shouldn't be as quiet as he makes it sound...



    CAF refs: Faulkton, Megalomaniac, Negativezeroz, boomer, dipitydoo, 93 saturn sl2, bjfish11, netherland24 & scotthulbs
    SiN refs: Josh99ta, Derek, crzystng, MrSector9, Sinister Audio

    Quote Originally Posted by faulkton View Post
    when i was in the army i would punch more bitches before breakfast than most people would punch all day.

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    Re: sub out of tune

    the box is tuned fine... 7hz wouldn't make THAT much difference.

    i've switched camps... the port is too small...

    build something with at least 25 sq inches of port (btw, your box is about to become a LOT bigger) and chances are the probem will disappear...



    CAF refs: Faulkton, Megalomaniac, Negativezeroz, boomer, dipitydoo, 93 saturn sl2, bjfish11, netherland24 & scotthulbs
    SiN refs: Josh99ta, Derek, crzystng, MrSector9, Sinister Audio

    Quote Originally Posted by faulkton View Post
    when i was in the army i would punch more bitches before breakfast than most people would punch all day.

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    acold7dusta's Avatar
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    Re: sub out of tune

    i know, the whole thing is baffling, i think iamamp3pimp and thatkidbob may be right, with the too small of a port area. it kinda sounds like the woofer is free airing, if you know what i mean. like the suspension wants to go, but its not feeding enough air?
    Last edited by acold7dusta; 09-23-2006 at 11:36 PM.



    01 Acura CL

    Eclipse CD3200
    Rainbow SLC 265 Active
    Sundown: SAX-50.4D
    ..............SAE-1000D
    Diamond D6 10" d2 sub
    ...........-.80 cu. ft FG sealed

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    thatkidbob's Avatar
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    Re: sub out of tune

    what are the settings on your HU and amplifier?



    CAF refs: Faulkton, Megalomaniac, Negativezeroz, boomer, dipitydoo, 93 saturn sl2, bjfish11, netherland24 & scotthulbs
    SiN refs: Josh99ta, Derek, crzystng, MrSector9, Sinister Audio

    Quote Originally Posted by faulkton View Post
    when i was in the army i would punch more bitches before breakfast than most people would punch all day.

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    acold7dusta's Avatar
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    Re: sub out of tune

    +3 on the head unit (out of 15) and the amp the gains at about 3:00 right now, bass boost a lil over 1/4, the LPF is 80 hz, subsonic around 30 hz, phase 0 degrees. the more i think of it, the more it kinda reminds me of a large, leaky sealed box. if i add another 3" port, in addition the one i got, would that raise or lower my tuning, assuming the ports the same exact length

    also, would it matter the length from the port in relation to the sub?



    01 Acura CL

    Eclipse CD3200
    Rainbow SLC 265 Active
    Sundown: SAX-50.4D
    ..............SAE-1000D
    Diamond D6 10" d2 sub
    ...........-.80 cu. ft FG sealed

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    thatkidbob's Avatar
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    Re: sub out of tune

    its going to raise your tuning...

    some people believe the port should be as far away from the subs as possible, but i don't know or understand the rationale behind that. If you've got a DMM laying around i'd reset the gains with it (but i doubt this is the problem), but other than that i don't see any problems with your settings.

    if it isn't the amp, HU, sub, or your settings, the only thing left (by elimination) is the box. If you'd like you can add another port, but this will raise your tuning significantly. It'll be just a hair over 39hz. edit: this is also going to increase your port velocity issue...



    CAF refs: Faulkton, Megalomaniac, Negativezeroz, boomer, dipitydoo, 93 saturn sl2, bjfish11, netherland24 & scotthulbs
    SiN refs: Josh99ta, Derek, crzystng, MrSector9, Sinister Audio

    Quote Originally Posted by faulkton View Post
    when i was in the army i would punch more bitches before breakfast than most people would punch all day.

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    acold7dusta's Avatar
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    Re: sub out of tune

    what if i put a baffle inside it to slow the back wave. say a board 12.5 x 5.5 (4 inches smaller than the depth) stuck a few inches away from the woofer?
    ive been messing around left and right with the settings, so its def not the settings. its definately the box.



    01 Acura CL

    Eclipse CD3200
    Rainbow SLC 265 Active
    Sundown: SAX-50.4D
    ..............SAE-1000D
    Diamond D6 10" d2 sub
    ...........-.80 cu. ft FG sealed

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