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Reload Thread: Coil Pairs, LMS & MASS Underhung

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    ciaonzo's Avatar
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    Coil Pairs, LMS & MASS Underhung

    Item(s) for Sale:

    6 pack of sweet coils. Selling only as pairs, no singles.


    Item(s) Description/Condition:

    A) Pair of original MASS underhung dual 4 ohm coils - ID 3.03" / OD 3.3" / WW .8" / FH 3.25"
    8 layer aluminum coil with Kapton former

    B) Pair of tall single 4 ohm coils - ID 3.03" / OD 3.2" / WW 2.9" / FH 3.9"
    4 layer aluminum coil with a split aluminum former

    C) Pair of MONSTER LMS single 4 ohm coils - ID 3.03" / OD 3.44" / WW 3.5" / FH 5.5"
    Variable layer aluminum coil with a split aluminum former
    Will take tons of power but you will need a huge motor, lol. Use a top plate height of 12-19mm


    Price:

    A) $100 shipped

    B) $100 shipped

    C) $150 shipped


    Shipping and Miscellaneous Item Information:

    CONUS only, please.


    Item Pictures:










    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.




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    Inferno333's Avatar
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    Re: Coil Pairs, LMS & MASS Underhung

    They're all so pretty!




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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by Inferno333 View Post
    They're all so pretty!
    I know, I'm hoping someone can put these to use. I kept a few for myself but I don't have enough motors for all of these coils.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

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    Souldrop's Avatar
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    Re: Coil Pairs, LMS & MASS Underhung

    In what subs were the LMS coils originally used?



    2016 Scion iM *In Progres*
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    Sub - 10" TC9 in 1ft^3 tuned to ~25 Hz (passive radiator)

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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by Souldrop View Post
    In what subs were the LMS coils originally used?
    I was thinking they would work in the RL-s motor but the OD is a bit too much. They are pretty much the same dimensions other than that. Would support an incredibly massive stroke of 4 inches plus, so deep parts are a must.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

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  8. #6
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    Re: Coil Pairs, LMS & MASS Underhung

    The LMS coils are PENDING.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

  9. #7
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    Re: Coil Pairs, LMS & MASS Underhung

    Up.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

  10. #8
    papermaker's Avatar
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    Re: Coil Pairs, LMS & MASS Underhung

    whats the mms on the lms coils?



    knowledge is powerful but imagination is exponentially powerful!

    experience is key! otherwise life is uneventful and pointless..

    keep in mind you have a great mind and remind yourself to be mindful.

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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by papermaker View Post
    whats the mms on the lms coils?
    208 grams per coil and sitting at an Re of 2.8 ohm.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

  12. #10
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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by ciaonzo View Post
    208 grams per coil and sitting at an Re of 2.8 ohm.
    holy smokes typical configuration is about450 grams.. talk about a huge motor..



    knowledge is powerful but imagination is exponentially powerful!

    experience is key! otherwise life is uneventful and pointless..

    keep in mind you have a great mind and remind yourself to be mindful.

  13. #11
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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by papermaker View Post
    holy smokes typical configuration is about450 grams.. talk about a huge motor..
    They weigh 208g as aluminum, just imagine if they were copper! The standard RL-s quad stack depth would work (two .75" slugs and two 1" slugs) but the gap needs to be just slightly bigger. Same WW as the RL-s coil, though.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

  14. #12
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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by ciaonzo View Post
    They weigh 208g as aluminum, just imagine if they were copper! The standard RL-s quad stack depth would work (two .75" slugs and two 1" slugs) but the gap needs to be just slightly bigger. Same WW as the RL-s coil, though.
    if you get some 3" by 80-90mm flat wound coils lmk. im gonna start putting some stuff together soon.. i'm also looking for some rubber surrounds.. high excursion..



    knowledge is powerful but imagination is exponentially powerful!

    experience is key! otherwise life is uneventful and pointless..

    keep in mind you have a great mind and remind yourself to be mindful.

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    Re: Coil Pairs, LMS & MASS Underhung

    it looks like a 2 layer then 4 layer on the ends? or its is 4 layer and 8 layer ends? BTW how much do the other 4 layer 74mm coils weight? they flat wound alum? what gauge? im interested..



    knowledge is powerful but imagination is exponentially powerful!

    experience is key! otherwise life is uneventful and pointless..

    keep in mind you have a great mind and remind yourself to be mindful.

  16. #14
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    Re: Coil Pairs, LMS & MASS Underhung

    looks like some round wire coils. flat wind gives you alot more options as for as length and resistance, just gotta use a bigger TP..



    knowledge is powerful but imagination is exponentially powerful!

    experience is key! otherwise life is uneventful and pointless..

    keep in mind you have a great mind and remind yourself to be mindful.

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    Re: Coil Pairs, LMS & MASS Underhung

    Quote Originally Posted by papermaker View Post
    it looks like a 2 layer then 4 layer on the ends? or its is 4 layer and 8 layer ends? BTW how much do the other 4 layer 74mm coils weight? they flat wound alum? what gauge? im interested..
    LMS coils are 4 layers very thick gauge, gotta be 18-20. The other coils are round aluminum 24 gauge bifilar winding so inductance is lower. Really nice coils.

    Hit me via PM for the other stuff so we can keep the for sale threads clean, thanks.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

  18. Likes papermaker liked this post
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