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Stereo Integrity's new HT Subwoofer - Page 27

post #781 of 2212
I would not port these unless you go to a 11 hz tune like Scott showed. Trust me, once you experience 10hz as loud as 20hz you won't ever go without. Most experience 10 hz but much lower than their 20hz capabilities.

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post #782 of 2212
Quote:
Originally Posted by djkest View Post


Why compare to 4 cubic feet sealed though? That is below the recommended size.

Because the drivers performed better than initially expected and most have found these excel in the smaller cabs. I started modeling with 6cf but reduced it to 4.25 per driver which should work out perfectly.
post #783 of 2212
Quote:
Originally Posted by MKtheater View Post

I would not port these unless you go to a 11 hz tune like Scott showed. Trust me, once you experience 10hz as loud as 20hz you won't ever go without. Most experience 10 hz but much lower than their 20hz capabilities.

Most people on AVS don't even experience a proper 20hz either. Even those with "good" subs. tongue.gif
post #784 of 2212
What are the T/S parameters that I need to input for these drivers for Winisd?
post #785 of 2212
Quote:
Originally Posted by bass addict View Post

Because the drivers performed better than initially expected and most have found these excel in the smaller cabs. I started modeling with 6cf but reduced it to 4.25 per driver which should work out perfectly.

Did the T/S parameters change? 6 cubic feet would be up ~ 2db at 20 Hz compared to a 4.25 cubic foot cab. The smaller cab handles more power, but is it really worth being able to throw more power at it with reduced output?
post #786 of 2212
Quote:
Originally Posted by MKtheater View Post

What are the T/S parameters that I need to input for these drivers for Winisd?

I am using WinISD drivers from HTS
http://www.hometheatershack.com/forums/diy-subwoofers-general-discussion/14410-downloadable-winisd-pro-files-11.html#post577840
post #787 of 2212
I use Josh Ricci's derived T/S specs.


Fs: 14.99hz
Re: 3.5Ohm
Qms: 2.88
Qes: .33
Sd: 1150.3cm2
Vas: 469.2l
Xmax: 23.5mm
Le: 3.87
post #788 of 2212
Quote:
Originally Posted by djkest View Post

Did the T/S parameters change? 6 cubic feet would be up ~ 2db at 20 Hz compared to a 4.25 cubic foot cab. The smaller cab handles more power, but is it really worth being able to throw more power at it with reduced output?

Sure, the 6 cube enclosure is more efficient but if I'm building a sealed box that size I'm going to be stuffing more than 1 driver in there. smile.gif Considering these drivers are ~190 each there is no reason I can see not to. smile.gif For those that aren't space/WAF limited and have less amp reserves by all means go with the most efficient enclosure you want to.

Quote:
Originally Posted by MKtheater View Post

I would not port these unless you go to a 11 hz tune like Scott showed. Trust me, once you experience 10hz as loud as 20hz you won't ever go without. Most experience 10 hz but much lower than their 20hz capabilities.

Agreed, just looking to try something different in the living room. There is no way I can get by with a 10+ cubic foot enclosure in this room. I've got plenty of the ultra low stuff going on with my quad dual opposed setup downstairs. Box/wood is cheap so it's fun to experiment. smile.gif It seems that I'm better off building dual opposed if I'm moving into the >7 cubic foot region anyway. These drivers are very inexpensive considering their output so I'd rather just add drivers, pick up the sensitivity and extension, and go sealed.
post #789 of 2212
the latest from SI is supposed to be based on Kippel measurements
post #790 of 2212
I'm in NY. Thanks everyone for offering to build. Great community.

I followed the GTG advice into getting the SubM, and it was the best audio purchase I ever made. I can't pass this opportunity up. I have a Dayton 15" RF in my car and it sounds incredible. I can easily see the SI 18" matching the SubM.

I even got the Sherwood Trinnov receiver off a closeout, which may replace my Denon 4311. Should be good times here.
post #791 of 2212
Quote:
Originally Posted by bhazard View Post

I'm in NY. Thanks everyone for offering to build. Great community.
I followed the GTG advice into getting the SubM, and it was the best audio purchase I ever made. I can't pass this opportunity up. I have a Dayton 15" RF in my car and it sounds incredible. I can easily see the SI 18" matching the SubM.
I even got the Sherwood Trinnov receiver off a closeout, which may replace my Denon 4311. Should be good times here.

Would love to hear your impressions of the Sherwood over the Denon smile.gif
post #792 of 2212
Quote:
Originally Posted by beastaudio View Post

Would love to hear your impressions of the Sherwood over the Denon smile.gif

Supposedly the 3D remapping of Trinnov outclasses XT32 in movies. XT32 has the advantage in overall sound though. For $300, it was an absolute steal to try, considering the receiver was originally $1,800, and is the only consumer product with Trinnov under $10,000. How it will do with the subs... we'll see. 1saleaday had them for a day, and will be selling them again soon.

Since we are budget minded in getting these subs (or 16 of them). It works into theme of a high class budget build. For not even the price of my Denon 4311, I could have a Submersive like 18" dual sub, and a good receiver? That's just silly good for such an expensive hobby (lifestyle).
Edited by bhazard - 1/8/13 at 12:43pm
post #793 of 2212
Quote:
Originally Posted by beastaudio View Post

Would love to hear your impressions of the Sherwood over the Denon smile.gif
Mike (MJAudio) swapped out his 5508 in favor of it. I tried one out but just couldnt get Trinnov to sound good in my room.
post #794 of 2212
Quote:
Originally Posted by edoggrc51 View Post

Mike (MJAudio) swapped out his 5508 in favor of it. I tried one out but just couldnt get Trinnov to sound good in my room.

That's right, you have that amazing LMS build... and you're swapping them for the SIs? That's awesome.
post #795 of 2212
Quote:
Originally Posted by bhazard View Post

That's right, you have that amazing LMS build... and you're swapping them for the SIs? That's awesome.
Thanks mang! But my quads arent going anywhere! lol smile.gif

Austin (Popalock) is the crazy mofo thats going from dual LMS's to 16 SI's. eek.gifbiggrin.gif
post #796 of 2212
Quote:
Originally Posted by edoggrc51 View Post

Thanks mang! But my quads arent going anywhere! lol smile.gif
Austin (Popalock) is the crazy mofo thats going from dual LMS's to 16 SI's. eek.gifbiggrin.gif

That's because he finally understands.
Popa...smart move!!! I'm highly impressed with your (GREAT) decision wink.gif
post #797 of 2212
Quote:
Originally Posted by edoggrc51 View Post

Thanks mang! But my quads arent going anywhere! lol smile.gif
Austin (Popalock) is the crazy mofo thats going from dual LMS's to 16 SI's. eek.gifbiggrin.gif

Good. Don't let em go.


But what you should do..... keep those LMS-U's right where they are at. Then, buy eight SI 18HT's and build four dual-opposed sealed boxes (or dual front firing) and put all of them right up front between your LS speakers. Perfect spot and it only takes a single 14k clone amp to power all of them. Yup. You don't have to thank me. biggrin.gif
post #798 of 2212
how big of a box would you need with that 11 hz tune? did someone screen shot a winisd plot that I missed?
post #799 of 2212
Quote:
Originally Posted by whiskey_face View Post

how big of a box would you need with that 11 hz tune? did someone screen shot a winisd plot that I missed?
Quote:
Originally Posted by Scott Simonian View Post

Nope. But if I were... I wouldn't build one in a small an enclosure as that. Yikes dude!
These are made to be used LLT style.


Plus, you know... I built two of these in 2007.
post #800 of 2212
Is that 27 cubic feet?!
post #801 of 2212
25cuft internal
post #802 of 2212
Quote:
Originally Posted by MKtheater View Post

I would not port these unless you go to a 11 hz tune like Scott showed. Trust me, once you experience 10hz as loud as 20hz you won't ever go without. Most experience 10 hz but much lower than their 20hz capabilities.

Even when tuned to 17 Hz, the ported model has more output than sealed all the way down to 10 Hz.
post #803 of 2212
hmm. . . pair of those + 2 2 x dual opposed "towers"



:edit: whats your wattage limit in a 25 cuft box? 300 clean? 400?
post #804 of 2212
Quote:
Originally Posted by djkest View Post

Even when tuned to 17 Hz, the ported model has more output than sealed all the way down to 10 Hz.

Nope. The higher you tune, the more likely you will absolutely require a HPF of sorts. The output below Fb is useless. Mine is tuned to 11hz and with room gain my lower limit is about 8-9hz. With a properly filtered 17hz tune one would be hard pressed to get any useful output below 15hz with that kind of system. Don't count on output below Fb in any resonant system.

Quote:
Originally Posted by whiskey_face View Post

hmm. . . pair of those + 2 2 x dual opposed "towers"

:edit: whats your wattage limit in a 25 cuft box? 300 clean? 400?

With what? These SI 18HT's? 600w is the sweet spot for long term use. That also equals the exact output of a Behringer ep4000 per channel @ 4ohms. Enough for two. smile.gif You could use a more powerful amp though, just be more careful if you aren't using a HPF.
post #805 of 2212
600 watts ayye. . . 25 cuft. . . damn dont think I can fit 25 cuft in the truck. . . but in la casa loco. . . . . biggrin.gif
post #806 of 2212
U-Haul
post #807 of 2212
What Scott said, anything below tune is mostly high distortion but many without HPF's will call this awesome bass but really THD.
post #808 of 2212
The only problem I see with that sim is that it says the Si tuned to 11hz would be more powerful than Ricci's REXXX with a similar tune, I don't see it. Again one is a sim and the other is a real number. I simulated my drivers and it says I will have over excursion at 7500 watts and in my room I have plenty for any movie running the LFE hot. I guess one does not need all this headroom for real life applications.
post #809 of 2212
Quote:
Originally Posted by zheka View Post

the latest from SI is supposed to be based on Kippel measurements
The parameters on SI are the same ones that were there months ago. They have not updated the T/S parameters based on Klippel testing.
post #810 of 2212
All my sims have been accurate. My LLT's were simmed the same way and they came out to a T.
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