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  1. #106
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    Re: zcon or hdc4

    I'd like to report back that I built a proper box for my HDC4, 4 cubes 36 hertz and on a Sundown SAZ1500dv2 at .5 ohm, it REALLY moves and produces a tremendous amount of bass. I hammered on it for about a half hour straight and it didn't get warm at all. I'm not sure if that's related to the coil or not, but I can definitely see my 30 second average score increasing if it handles the power this effortlessly.





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  2. #107
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    Re: zcon or hdc4

    Quote Originally Posted by T3mpest View Post
    Basically all of them.. Especially since everyone here runs 1.5-2k to most of their wooofers. Power compression is a ***** and the extra weight of the coil is more than offset by the extra coil in the gap creating more motor force. There is NOTHING magic about a 3inch coil. We could all go down to 2inch coils for better effeciency if smaller coils were really better.. They aren't, they make for lesser BL numbers all things equal and in the long term handle significantly less power.

    3inch coils can be built to handle large amounts of power, but the tradeoffs they general make to do so arent' always acceptable. That's why most "big boy" 3inch coiled woofers sound like crap. Much easier to make a musical 3k handling subwoofer using a 4inch coil than a 3inch coil.

    My current subwoofer uses a 6inch voicecoil.. Bl^re value of well over 300, so significantly stronger than any 3inch coiled woofer outside of a DDZ or something of that nature that sounds like crap and does nothing but burp and it's 96db/1w/1m at 1000hz (and yes it WILL play that high if you wanted it too)

    Even companies like DD are moving to 4inch coils for their daily applications at the highest level, look at the 9900 series, IIRC, it's a 4inch coil.

    The ONLY reason many big subs use 3inch coils is because with the proper treatements to the motor, (most of which make the woofer sound like **** for music) you can give a 3inch coil enough power for 3 seconds to run the suspension into xmax near tuning without frying the coil.. Once you hit that point, there is no point in using a bigger heavier coil. You just need very powerful magnet to make up for the lack of coil area compared to a 4inch coil, and a thick 3inch coil. Most companies top end line are comp oriented, or at least they mostly care how loud the woofer is below 60hz than anything else, so that's a perfectly fine application.. Doesn't make it ideal for daily though.
    I'll be interested to see how long a 4" coil hangs with a 3000W 50hz sine wave. You make some good points but I think the actual difference in thermal power handling isn't quite as dramatic as we'd be led to believe.




  3. #108
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    Re: zcon or hdc4

    Quote Originally Posted by Slobalt View Post
    It was just a hypothetical reference, that makes sense.
    He mentioned efficiency, but referenced guys who throw 20-40kw to a sub for burps lol




  4. #109
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    Re: zcon or hdc4

    My only "real world" experience is:

    HDC3 18 - about 7kw clamped = 153.7

    HDC4 18 - same power/box = 154.9

    Wish I would have done lower power testing, but I'm not power limited by class so I didn't bother...




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  6. #110
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    Re: zcon or hdc4

    Ok so I went with the zcon 12.
    I'm starting to design my box and I'm wondering if I should use ssa's predesigned box or not. They have a port 3.5" x 13" and when I go into winisd it says to keep port velocity around 80ft/s and under I need a port size 5.5 x 13 (@34hz) both are 3 cubes net



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  8. #111
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    Re: zcon or hdc4

    Any thoughts should I go with predesigned box or one with a giant port?



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  9. #112
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    Re: zcon or hdc4

    Our enclosure designs work well for most daily driving installs.





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  10. #113
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    Re: zcon or hdc4

    Quote Originally Posted by denim View Post
    Our enclosure designs work well for most daily driving installs.
    What’s the optimum enclosure tuned at?



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  11. #114
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    Re: zcon or hdc4

    Quote Originally Posted by Slobalt View Post
    What’s the optimum enclosure tuned at?
    31hz.





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    Re: zcon or hdc4

    Quote Originally Posted by denim View Post
    31hz.
    I feel like that's a little low but what do I know. I'm going to take your word for it and build that. You've been a great help, thank you.



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  13. #116
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    Re: zcon or hdc4

    Quote Originally Posted by Slobalt View Post
    I feel like that's a little low but what do I know. I'm going to take your word for it and build that. You've been a great help, thank you.
    If you want to tune a little higher, go for it. That is just our suggestion that aims to sit in a nice middle ground for most listening tastes.





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  14. #117
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    Re: zcon or hdc4

    Quote Originally Posted by Slobalt View Post
    I feel like that's a little low but what do I know. I'm going to take your word for it and build that. You've been a great help, thank you.
    If you want to tune a little higher, go for it. That is just our suggestion that aims to sit in a nice middle ground for most listening tastes.





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