Stereo Integrity's new HT Subwoofer - Page 27

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.

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.

Most people on AVS don't even experience a proper 20hz either. Even those with "good" subs.

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

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?

I am using WinISD drivers from HTS
http://www.hometheatershack.com/forums/diy-subwoofers-general-discussion/14410-downloadable-winisd-pro-files-11.html#post577840

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

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. Considering these drivers are ~190 each there is no reason I can see not to. 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.


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. 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.

the latest from SI is supposed to be based on Kippel measurements

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

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

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.

Thanks mang! But my quads arent going anywhere! lol

Austin (Popalock) is the crazy mofo thats going from dual LMS's to 16 SI's.

That's because he finally understands.
Popa...smart move!!! I'm highly impressed with your (GREAT) decision

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.

how big of a box would you need with that 11 hz tune? did someone screen shot a winisd plot that I missed?

Plus, you know... I built two of these in 2007.

Is that 27 cubic feet?!

25cuft internal

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

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



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

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.


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. You could use a more powerful amp though, just be more careful if you aren't using a HPF.

600 watts ayye. . . 25 cuft. . . damn dont think I can fit 25 cuft in the truck. . . but in la casa loco. . . . .

U-Haul

What Scott said, anything below tune is mostly high distortion but many without HPF's will call this awesome bass but really THD.

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.

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.

All my sims have been accurate. My LLT's were simmed the same way and they came out to a T.