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Reload Thread: Subs FS same as my car's peak.

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    Subs FS same as my car's peak.

    Made some new 12's today I'm very happy with, but they have FS of 55hz. They sound quite good in a large, somewhat low tuned box, but thinking of SPL box application I see high impedence being an issue though I think there must be some opportunity for efficiency here somewhere.

    Anyone have any experience with this?







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    Re: Subs FS same as my car's peak.

    smaller box with more port?? might do the trick...



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    Re: Subs FS same as my car's peak.

    What's the Qts?

    ---------- Post added at 09:41 PM ---------- Previous post was at 09:41 PM ----------

    And Vas while we're at it?



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    Re: Subs FS same as my car's peak.

    .5 cubes sealed should do the trick for max spl



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    Re: Subs FS same as my car's peak.

    Quote Originally Posted by groundpound4200 View Post
    .5 cubes sealed should do the trick for max spl
    This brought the lulz. I needed that thanks haha



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    Re: Subs FS same as my car's peak.





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    Re: Subs FS same as my car's peak.

    Quote Originally Posted by Buck View Post
    What's the Qts?

    ---------- Post added at 09:41 PM ---------- Previous post was at 09:41 PM ----------

    And Vas while we're at it?
    * f(s)= 55.18 Hz
    * R(e)= 6.10 Ohms
    * Z(max)= 29.10 Ohms
    * Q(ms)= 2.649
    * Q(es)= 0.703
    * Q(ts)= 0.555
    * V(as)= 20.580 liters (0.727 cubic feet)
    * L(e)= 3.47 mH
    * n(0)= 0.47 %
    * SPL= 88.81 1W/1m
    * M(ms)= 213.40 grams
    * C(ms)= 0.04 mm/N
    * BL= 25.35

    I expect Fs, Qms and Qts to shift a little bit as the suspension loosens up, but in theory I can change compliance with different softparts




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    Re: Subs FS same as my car's peak.

    What woofer is this?



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    Re: Subs FS same as my car's peak.

    Surprised to see Qes sitting at .7 while BL is at a pretty respectable 25ish.



    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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    Re: Subs FS same as my car's peak.

    Quote Originally Posted by Buck View Post
    What woofer is this?
    Shocker Sig Neo using new dual 3 ohm copper Sig coil, Hawley cone and 3 spiders




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    Re: Subs FS same as my car's peak.

    Quote Originally Posted by ciaonzo View Post
    Surprised to see Qes sitting at .7 while BL is at a pretty respectable 25ish.
    Something about this neo motor... this was an 18" I did with the dual 2.8 ohm Aluminum and very stiff suspension:

    Fs 45.09 [Hz]
    Zm 21.64 [Ohms]
    BL 22.81 [N/A]
    Qms 2.897
    Qes 0.984
    Qts 0.735
    Vas 113.900 [liters]
    L10k 2.86 [mH]
    n0 1.01 [%]
    dBSPL 92.15 [1W/1m]
    Ms 329.30 [grams]
    Cms 0.04 [mm/N]


    Qes and Qts are generally very low with ceramic sig.




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    Re: Subs FS same as my car's peak.

    Interesting. Yeah, Qes/Qts should be insanely low, all things being equal. Seems like either you could fit more layers in the gap or the motor needs a chargin'.

    Or maybe that's jes how it is, lol.



    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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    Re: Subs FS same as my car's peak.

    Quote Originally Posted by ciaonzo View Post
    Interesting. Yeah, Qes/Qts should be insanely low, all things being equal. Seems like either you could fit more layers in the gap or the motor needs a chargin'.

    Or maybe that's jes how it is, lol.
    Gap is tighter than a 12 year old's shoelaces and if you ever tried to remove something ferrous that was stuck to these motors you wouldn't question the integrity of the neo....really even assuming the neo lost 80% of it's strength it would still have as much magnetic force as the ceramic sig.

    Just how it is I think, these motors give some wild specs with aluminum coils as well.




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    Re: Subs FS same as my car's peak.

    pics of sub!



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    Re: Subs FS same as my car's peak.

    Quote Originally Posted by hispls View Post
    Gap is tighter than a 12 year old's shoelaces and if you ever tried to remove something ferrous that was stuck to these motors you wouldn't question the integrity of the neo....really even assuming the neo lost 80% of it's strength it would still have as much magnetic force as the ceramic sig.

    Just how it is I think, these motors give some wild specs with aluminum coils as well.
    Crazy.

    Well, either way, keep doin' it. And I hope you didn't take my suggestions as me underestimating your abilities, wasn't aiming at that.



    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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