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Stereo Integrity's new HT Subwoofer - Page 74

post #2191 of 2212
I'm starting to think about sub options for my dedicated theater build and I'd like to try the DIY approach. My room is 22' x 13.5' x 7.5' and is going to be sealed up pretty well. I'm going to use some of the DIY Seos speakers from diysoundgroup -- the Fusion Tempests as LCR which will sit behind an acoustically transparent screen.

I was thinking about 2 of these SI 18 D2 in two of Erich's 4 cu ft flat packs powered by an iNuke nu3000 or nu6000.

Seems like a fairly inexpensive build -- just wondering what type of performance I might expect in my room with 80% movie content, 20% music.

Gear mentioned in this thread:

post #2192 of 2212
You can download and use WinISD to model the output available with the power available in the box size chosen.

If my understanding is correct then my modelling for a quad setup of the same sub in a roughly similar size sealed box with 1250w each can be reduced to 6dB (i.e. half the output) which would mean something like 126dB max output higher up the range, coming down to about 102dB at 10Hz.

IIRC the nu3000 gives about 1100wRMS per channel @ 2Ohm, 2200wRMS bridged @ 4 Ohm, so if you order D4 instead of D2 and wire the D4 voicecoils in parallel to show 2Ohm to the amp (assuming one driver on each channel) that would give you pretty much the same performance.

I *think*...
Edited by MemX - 1/9/14 at 10:10am
post #2193 of 2212
Oof, I am embarrassed by how long it took me to realize I had a bad seal. Removing the SI hard rubber gasket, using drywall anchors, and plumbers putty tape I got a good seal last night. I am blown away by the improvement. "Sealed sub" means like watertight!

I am now so intimidated by the sub's potency, I will ask IT what movie it'd like to play, instead of just rudely "popping one in"!
post #2194 of 2212
Yea, not a big fan of the gaskets, but some huge #10 or #12 screws and weight on the drill will suck just about anything up to the baffle. Did you use any closed-cell foam in conjunction with the SI's ring? That usually helps tremendously. I use it on ALL of my speaker designs
post #2195 of 2212
No, I didn't appreciate just how sealed it needed to be, how flaky the built in gasket is, and how soft MDF is. I opened it up a couple times to add stuffing, and I'm sure it got worse, although it was never fully sealed. When I'd hear rattling I thought it was stuffing or cables flopping. A Google search yielded mostly talk of lack of a good seal.

Might need more of this in sealed sub FAQ, since I'm pushing the envelope of n00bery! smile.gif
post #2196 of 2212
Quote:
Originally Posted by Eyleron View Post

No, I didn't appreciate just how sealed it needed to be, how flaky the built in gasket is, and how soft MDF is. I opened it up a couple times to add stuffing, and I'm sure it got worse, although it was never fully sealed. When I'd hear rattling I thought it was stuffing or cables flopping. A Google search yielded mostly talk of lack of a good seal.

Might need more of this in sealed sub FAQ, since I'm pushing the envelope of n00bery! smile.gif
Experienced the exact same thing a few days ago with the 21" B&C. It was not NEARLY tight enough and at 10Hz, the knock would occur. I also thought it was internal cabling slapping against the cone but soon learned otherwise. Got some blisters but the weather-seal foam gasket [Walmart] can barely be seen now that it is dog tight (with #12 screws). No more knock! This should definitely make sub FAQ.wink.gif
post #2197 of 2212
How many of these SI 18's could I run of off one Crown Itech 8000 on a 240 volt line.
post #2198 of 2212
they are good with about 1kw of power each, so however that works wired up to the amp. not sure if they are still available or not. were on closeout...
post #2199 of 2212
Quote:
Originally Posted by LTD02 View Post

...not sure if they are still available or not. were on closeout...

D2 is still available...smile.gif
post #2200 of 2212
Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.
post #2201 of 2212
Oof, I am embarrassed by how long it took me to realize I had a bad seal. Removing the SI hard rubber gasket, using drywall anchors, and plumbers putty tape I got a good seal last night. I am blown away by the improvement. "Sealed sub" means like watertight!

I am now so intimidated by the sub's potency, I will ask IT what movie it'd like to play, instead of just rudely "popping one in"!


Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.
post #2202 of 2212
Quote:
Originally Posted by Eyleron View Post

Oof, I am embarrassed by how long it took me to realize I had a bad seal. Removing the SI hard rubber gasket, using drywall anchors, and plumbers putty tape I got a good seal last night. I am blown away by the improvement. "Sealed sub" means like watertight!

I am now so intimidated by the sub's potency, I will ask IT what movie it'd like to play, instead of just rudely "popping one in"!

Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.
post #2203 of 2212
Quote:
Originally Posted by farmerman View Post

Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.

Quote:
Originally Posted by farmerman View Post

Oof, I am embarrassed by how long it took me to realize I had a bad seal. Removing the SI hard rubber gasket, using drywall anchors, and plumbers putty tape I got a good seal last night. I am blown away by the improvement. "Sealed sub" means like watertight!

I am now so intimidated by the sub's potency, I will ask IT what movie it'd like to play, instead of just rudely "popping one in"!


Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.

Quote:
Originally Posted by farmerman View Post

Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.


Dude. It's pretty easy. Use up to 1lb per cubic foot. Glue or secure if you want. It is not necessary.

Use this: http://www.amazon.com/Mountain-Mist-Fiberloft-Polyester-Stuffing/dp/B00114ONKM/ref=sr_1_3?ie=UTF8&qid=1395632461&sr=8-3&keywords=polyfill
post #2204 of 2212
Quote:
Originally Posted by farmerman View Post

Please give info on stuffing used and how much used. also where you acquired stuffing. was it glued in or loosely inserted.

thanks a mil
post #2205 of 2212
Quote:
Originally Posted by laugsbach View Post

Quote:
Originally Posted by LTD02 View Post

...not sure if they are still available or not. were on closeout...

D2 is still available...smile.gif

Apparently not now, I seem to have sneaked in an order of 2 on Monday, and someone in another thread reported sold out late yesterday.
post #2206 of 2212
Quote:
Originally Posted by lovinthehd View Post

Apparently not now, I seem to have sneaked in an order of 2 on Monday, and someone in another thread reported sold out late yesterday.

That appears to be correct according to their site. All that is left are 15" D4s.

Although, this was posted on the "News From Stereo Integrity thread":

Originally Posted by rnconync View Post

Interesting bit if info...I emailed Stereo Integrity a while back asking about the reason for putting the Home Theatre subs on clearance if it was for a new model or discontinuing them..I just got this response from Nick at SI today:

"We had initially planned on discontinuing the HT line but they sold so well at the discounted price we are now looking at re-stocking them and leaving the price the same. We will not be introducing new lines, only re-stocking the HT series which will take about 3 to 4 months."

eek.gif
post #2207 of 2212
Well thats great to hear.
post #2208 of 2212
I hope they do indeed get restocked... I was strongly considering pulling the trigger on two of the remaining 15" D4s, but a pair of 18" D4s is what I'd really prefer. Telling my wife I'd bought parts for a dedicated theater in a house we won't even be breaking ground on for another year was going to be the hardest part.

If they don't get restocked, I guess I'll be back to plan B, a pair of Dayton RSS460HO-4 18s, though that will be notably more expensive for (I assume) a decent bit less headroom. What are other alternative drivers I haven't considered (preferably under $200 each)? I'm planning dual-sealed in largish (4-6 cu ft) enclosures powered by an iNuke 3000 DSP. I could just as easily go ported in ~8 cu ft enclosures as well, as both subs will likely be behind an AT 2.35:1 screen.
post #2209 of 2212
Quote:
Originally Posted by Stephen Hopkins View Post

What are other alternative drivers I haven't considered (preferably under $200 each)? I'm planning dual-sealed in largish (4-6 cu ft) enclosures powered by an iNuke 3000 DSP. I could just as easily go ported in ~8 cu ft enclosures as well, as both subs will likely be behind an AT 2.35:1 screen.

There aren't any, for under $200 that is. The HO 18's model very similar. Headroom on both systems if identical will be about the same.
post #2210 of 2212
Quote:
Originally Posted by beastaudio View Post

There aren't any, for under $200 that is. The HO 18's model very similar. Headroom on both systems if identical will be about the same.

The extra 10mm of XMAX on the SI 18 won't allow it to be pushed further before distorting? Or is the XMAX of the HO being under-reported by Dayton?
post #2211 of 2212
Haha, yea just looked. That is under reported for sure. Josh at Data-Bass tested a "useful" 20mm number for the dayton, after which it began to distort pretty heavily.
post #2212 of 2212
Quote:
Originally Posted by beastaudio View Post

Haha, yea just looked. That is under reported for sure. Josh at Data-Bass tested a "useful" 20mm number for the dayton, after which it began to distort pretty heavily.

Well I feel a little bit better about the HO being Plan B... I just won't feel too great about it if the SI 18s don't come back in stock and I actually have to fork out the extra $75-$100.
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