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Reload Thread: 4th order folks, tell me if I am on track!

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    4th order folks, tell me if I am on track!

    here are the specs for my 2 old 10's.

    Power Rating RMS Cont. 250 Watts
    Max Power Rating-Unclipped Amp 350 Watts
    Freq Response 25-150 Hz
    Nominal Imp 8 Ohms
    Voice Coil 2" 4 Layer
    FS 25.18 Hz
    Qms 8.8040
    Qes 0.3579
    Qts 0.3439
    Vas 67.30 Liters
    Cms 0.3994E-03 M/N
    Re 6.93Ohms
    BL 17.505 Newtons/Amp
    Sd 0.034636 Sq. m.
    Mms 0.100017 Kg
    Hvc 0.980"
    Hag 0.375"
    Xmax 0.303"
    Xlin 0.605"
    Ref Eff 0.2885%

    Here is what I have box related.
    My max H is 13 inches, width is 16 inches, and lenght is 38 inches

    Sealed side is .936
    Ported side is 2.042
    Port is 55 square inches tuned to 55hz.

    Trying to play music from 70 down and be musical. Not worried about metering at all. Will be giving the pair a true 800rms from an old Rockford 800 A2. What do you think so far?







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    Re: 4th order folks, tell me if I am on track!

    I would bring your tuning down some for a daily setup maybe 45-50

    I can not comment on the specs though as I'm on my phone and I don't feel like doing math in my head..far to early for that.




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    Re: 4th order folks, tell me if I am on track!

    I had a feeling the tuing was too high. If I brought the tuning down, I would have no issues playing 70 down? I would like it to play flat if possible.




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    Re: 4th order folks, tell me if I am on track!

    Quote Originally Posted by Jroo View Post
    I had a feeling the tuing was too high. If I brought the tuning down, I would have no issues playing 70 down? I would like it to play flat if possible.
    If you want more control then I would suggest a 6th order which will typically have a more "smooth" response curve. A 4th order by nature will have a decently sized peak.




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    Re: 4th order folks, tell me if I am on track!

    i was told a few times these woofers would do very well in a 4th order. What are people looking at to say that they are 4th or 6th order. My 4th could have a peak as long as it down lower.




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    Re: 4th order folks, tell me if I am on track!

    yeah I'd tune that lower I always like lower tuned ports. Higher tuned ones just don't give the bass enough depth to me.




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    Re: 4th order folks, tell me if I am on track!

    Firstly and importantly, what vehicle is it being placed in, and where? This will have a big effect on cabin gain which youll need to get an idea for to shape the response of the enclosure.



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    Re: 4th order folks, tell me if I am on track!

    going in the hatch area of a Pathfinder.




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    Re: 4th order folks, tell me if I am on track!

    another question. Does port up or back matter with bandpass, like it does with ported. I was just going to do port up.




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    Re: 4th order folks, tell me if I am on track!

    any thoughts?




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    Re: 4th order folks, tell me if I am on track!

    I'd go bigger on the sealed section and smaller on the ported because of the weak motors on those subs you'll have almost no lows with the specs you listed.



    Refs: diyma-sold to:Mazda3SQ CA.com-traded:matrxx dude CACO- Sold to: Ajax_6154, brandonb1029, TeejayBee traded with: papito FLSPL- Bought from:98chevySPL, JBLCAMRY, traded with:97montecarlo, thumpenranger

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    Re: 4th order folks, tell me if I am on track!

    how much would the Fs play on going low. These subs are basically the credence build house no named solobarics. When I called on them, they said think the old round solobaric with a generic label on them. I would agree that compared to newer subs, these dont have the motor that is out there now. So a larger sealed vs smaller ported aids in how low a bandpass will play?




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    Re: 4th order folks, tell me if I am on track!

    Ok, so I played with a few online calculators and took the average of what they all said. Each gave me something differernt.

    Sealed side 1.17
    Ported side 0.57
    Tuning Frequency 43.87

    They are saying this will play roughly 76 Hz to 25 Hz. These are looking more like the recommendations that Flastrongman said by going way larger on the sealed side and smaller on the ported. I also figure I will keep the port around my original 55 square inches. What do you think now?




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    Re: 4th order folks, tell me if I am on track!

    that's too small now. just do a 1:1 ratio if you want them to have a good freq response. 1.5 sealed/1.5 ported tuned to around 50hz



    Refs: diyma-sold to:Mazda3SQ CA.com-traded:matrxx dude CACO- Sold to: Ajax_6154, brandonb1029, TeejayBee traded with: papito FLSPL- Bought from:98chevySPL, JBLCAMRY, traded with:97montecarlo, thumpenranger

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    Re: 4th order folks, tell me if I am on track!

    Is it just me or does these parameters steer more towards a 6th order than a 4th?



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