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Thread: New articles written by Dr. Floyd Toole x4 subs

  1. #1
    JBL 4645
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    Smile New articles written by Dr. Floyd Toole x4 subs

    I have heard thereís a new article written by Dr. Floyd Toole, on using 4 sub bass units to smoothen out the bass response. If so is this article currently published over the Internet?

  2. #2
    clmrt
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    Probably not this - -

    http://www.infinitysystems.com/homea...nf-rooms_3.pdf

    Perhaps this....

    http://www.harman.com/wp/pdf/multsubs.pdf


    ...yes, the second one.

  3. #3
    Senior Member
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    Smile Is this what you mean?

    This is the seminal work, which I've referenced many times (here and elsewhere) as my bible of sub deployment.

    http://www.harman.com/wp/pdf/multsubs.pdf

    Then there's this well-known interview by Dr. Toole and Todd Welti as the follow up to the white paper.

    http://www.onhometheater.com/features/20040801.htm

    Todd Welti and Allan Devantier published a paper on the topic with AES in May:

    http://www.aes.org/e-lib/browse.cfm?elib=12417

    If you're not an AES member, it'll cost you $20 to read it.
    Out.

  4. #4
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    Wink Yes, I have more.

    If you want to see a picture of ol' Floyd and read an older article, then this is for you.

    http://www.homecinemachoice.com/arti...FloydToole.php
    Out.

  5. #5
    JBL 4645
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    Titanium Dome

    Cheers mate Iím reading though the first one now this could be the holy Grill of JBL sound mate.

  6. #6
    clmrt
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    What am I, chopped liver??

  7. #7
    JBL 4645
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    clmrt

    LOL, no mate high numbers to you too mate well done we must all work together if where to discover the Holy Grail of Sub Bass in the home cinema, a more purer and more smoother response for a wide listening area.

    There is a lot of mathematics in it that I donít fully understand while the practical term of just simple placement in the room may solve the problems within a few minutes or more.

  8. #8
    RIP 2011 Zilch's Avatar
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    Geddes just wrote (June, actually, but published October) in a letter response to the AES Journal Welti & Devantier article that mounting "one of subs [of three total] above the room's centerline significantly reduces the variance of the field in both spatial and frequency domains."

    "A paper is planned...."

    So, our HT sub should be ABOVE the screen? :dont-know

  9. #9
    clmrt
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    Floor-to-ceiling stacks....drool

  10. #10
    RIP 2011 Zilch's Avatar
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    Don't care WHAT he says, I ain't hangin' no Sub1500 from the ceiling, nope.

    [And CERTAINLY not the TCB Monster Sub.... ]

  11. #11
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    Talking

    Quote Originally Posted by clmrt View Post
    What am I, chopped liver??
    Mm-m-m-m-mmm! Chopped liver.
    Attached Images Attached Images  
    Last edited by Titanium Dome; 11-08-2006 at 06:27 PM. Reason: better Homer
    Out.

  12. #12
    JBL 4645
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    Quote Originally Posted by Zilch View Post
    Don't care WHAT he says, I ain't hangin' no Sub1500 from the ceiling, nope.

    [And CERTAINLY not the TCB Monster Sub.... ]
    Zilch

    LOL, the next thing you know it breaks away from the ceiling and bloody warring the damn thing!

    You could build a false ceiling however, with enough support to take the weight, the calculated weight of the sub bass units that would be installed in the ceiling.

    Question is, do you stick just the sub bass driver into the ceiling or the whole damn thing! I have seen the JBL in-ceiling sub bass donít worry mate, itís just this what design do you go with?

  13. #13
    JBL 4645
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    Quote Originally Posted by Zilch View Post
    Don't care WHAT he says, I ain't hangin' no Sub1500 from the ceiling, nope.

    [And CERTAINLY not the TCB Monster Sub.... ]


    LOL, Oh yeah sheís a beauty this is all need sod the neighbours Iím going to play this JBL sucker loud!!

  14. #14
    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by JBL 4645 View Post
    Zilch

    LOL, the next thing you know it breaks away from the ceiling and bloody warring the damn thing!

    You could build a false ceiling however, with enough support to take the weight, the calculated weight of the sub bass units that would be installed in the ceiling.

    Question is, do you stick just the sub bass driver into the ceiling or the whole damn thing! I have seen the JBL in-ceiling sub bass donít worry mate, itís just this what design do you go with?
    Is that like "The Damocles Code"
    Hang subwoofers from the ceiling but be careful where you sit?
    I can see the movie now ...
    2ch: Oppo, Acurus RL-11, JBL 240ti, Heath AS101, Carver TFM-25,Von Schweikert VR4
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460,

  15. #15
    JBL 4645
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    hjames

    Na mate it will be ok, just make sure you stick a few extra supports under the ceiling!

    I can imagine the force of air mass flow and the sound pressure levels with x4 JBL TCB 18Ē THX in the room damn boy play that baby loud and stick in the earplugs!

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