Stereo Integrity DS4-18 - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 1143 Old 11-15-2015, 01:42 AM - Thread Starter
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Stereo Integrity DS4-18

There was a nice thread on this but it seems to be gone now. It looks like these will be replacing the HT line.

Leaving this here to help keep all information in one thread.

Quote:
Originally Posted by Electrodynamic View Post
The final prototype is finished for the 4" coil DS4-18" subwoofer and here are the T/S parameters:

Re: 3.9 Ohms
Fs: 18.7 Hz
Qes: 0.65
Qms: 2.19
Qts: 0.50
Le: 1.52 mH
Sd: 121736.4 mm^2 (18869 in^2)
Vas: 270 L
BL: 19.9
Mms: 561.42 g
Cms: 128.2 uM/N
SPL; 86.1 dB 1W/1M
SPL: 89.1 dB 2.83V/1M
Xmax: 27 mm
Xmech: 50 mm

Price will be under $270 shipped per driver inside the lower 48 continental United States. We will offer a pre-order with a $10 discount. Pricing on this driver is aggressive so there is no room for higher discounts.

Here is a picture of the rear of the driver. The driver is sitting on its face/surround in the picture but you can see the slight motor revisions like the smaller pole vent and the addition of gap vents.

Does anyone know if these are DVC? 4 ohms? If so, these would work great with an inuke3000dsp

Waiting to hear more about this and when the pre order starts.
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post #2 of 1143 Old 11-15-2015, 01:50 AM
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nice...!
must be dvc, has terminals on 2 sides...
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post #3 of 1143 Old 11-15-2015, 04:07 AM
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Have you done any modelling yet with Winisd? What would be a sweet internal volume size for sealed enclosure?
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post #4 of 1143 Old 11-15-2015, 04:35 AM
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If anything, it's good there will finally be competition for the Ultimax in this price bracket. The HT18 certainly wasn't on the UM's level (though impressively close considering the price difference), but this DS4 looks really nice.
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post #5 of 1143 Old 11-15-2015, 04:36 AM
 
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YAY another SI sub!!!!!
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post #6 of 1143 Old 11-15-2015, 05:22 AM
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looks like it models very similar to the UM18 in the same volume with same power but it can take more power or go in a bigger box.

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post #7 of 1143 Old 11-15-2015, 05:33 AM
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1800 watts and 6cft looks pretty potent

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post #8 of 1143 Old 11-15-2015, 06:08 AM
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How many more posts until:


I see one post.....but hoping for the best. 4" vc, 27mm Xmax and an 18" sounds like a win win to me. 270 each and 50lbs is awesome. HornResp I go.
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post #9 of 1143 Old 11-15-2015, 06:55 AM
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Quote:
Originally Posted by chrapladm View Post
How many more posts until:


I see one post.....but hoping for the best.
Well, considering he once told me I'm the kind of person that makes people want to leave forums like AVS, I'm not surprised he has some enemies.
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post #10 of 1143 Old 11-15-2015, 09:02 AM
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Quote:
Originally Posted by donnyp05 View Post
Does anyone know if these are DVC? 4 ohms? If so, these would work great with an inuke3000dsp

Waiting to hear more about this and when the pre order starts.
These are dual 2 ohm VC's. The previous thread said so.
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post #11 of 1143 Old 11-15-2015, 12:11 PM - Thread Starter
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Quote:
Originally Posted by dtsdig View Post
These are dual 2 ohm VC's. The previous thread said so.
Haha, yeah I noticed the terminals in the pictures right after I posted that.

These should compete well with the UM18-22.
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post #12 of 1143 Old 11-15-2015, 01:06 PM
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Dope!! ETA?!
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post #13 of 1143 Old 11-15-2015, 03:40 PM - Thread Starter
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Quote:
Originally Posted by frankie2075 View Post
Dope!! ETA?!
Not sure. Follow this thread or check his Facebook page.
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post #14 of 1143 Old 11-15-2015, 04:39 PM
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Quote:
Originally Posted by frankie2075 View Post
Dope!! ETA?!
I believe April was the target mentioned in the original post.
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post #15 of 1143 Old 11-15-2015, 05:45 PM
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Quote:
Originally Posted by Ketnis View Post
If anything, it's good there will finally be competition for the Ultimax in this price bracket. The HT18 certainly wasn't on the UM's level (though impressively close considering the price difference), but this DS4 looks really nice.
how was the ht18 not on UM's level ?
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post #16 of 1143 Old 11-16-2015, 12:56 AM
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Quote:
Originally Posted by Bombelman View Post
how was the ht18 not on UM's level ?
By being slightly worse overall. Apologies if that was confusing for you.
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post #17 of 1143 Old 11-16-2015, 01:57 AM
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Quote:
Originally Posted by Ketnis View Post
Quote:
Originally Posted by Bombelman View Post
how was the ht18 not on UM's level ?
By being slightly worse overall. Apologies if that was confusing for you.
please provide more details
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post #18 of 1143 Old 11-16-2015, 03:51 AM
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Stereo Integrity DS4-18

The HT18 has less usable Xmax, lower power handling, high inductance, weaker motor, and super high Qts that makes it best suited for IB.
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Last edited by rhodesj; 11-16-2015 at 04:25 AM.
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post #19 of 1143 Old 11-16-2015, 10:46 AM
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Quote:
Originally Posted by rhodesj View Post
The HT18 has less usable Xmax, lower power handling, high inductance, weaker motor, and super high Qts that makes it best suited for IB.
Tis true.

The HT18 is an awesome budget sub, but the UM18 is a notch up. Will be interesting to see how the DS4 competes with it.
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post #20 of 1143 Old 11-16-2015, 01:39 PM
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Quote:
Originally Posted by rhodesj View Post
The HT18 has less usable Xmax, lower power handling, high inductance, weaker motor, and super high Qts that makes it best suited for IB.
I wouldn't go that far on the description but yes, overall the UM18 is "better" than the HT18's in each respective category. The UM18 is also noticably more expensive but not too much more. It's a worthy upgrade and this DS4 driver should just eek out past the UM18 by as much performance for the same dollar.
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post #21 of 1143 Old 11-16-2015, 07:44 PM
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Quote:
Originally Posted by Scott Simonian View Post
I wouldn't go that far on the description but yes, overall the UM18 is "better" than the HT18's in each respective category. The UM18 is also noticably more expensive but not too much more. It's a worthy upgrade and this DS4 driver should just eek out past the UM18 by as much performance for the same dollar.
Tnx for the update guys. I have read the comments and understand now how the UM is a better sub in performance.
I don't want to bash any brand, but I must share my experience with you I have with UM subs of several sizes.
Within 6mo of purchase, I noticed the distorted sound coming from the sub/cone. After removing the driver from
the sub-enclosure, inspection showed the spider had "sagged" and was not straight anymore.
This happened with the driver facing the front of the enclosure, so it was not upright or downward.
When I contacted PE about this, I was asked to send pics, which I did, and I was offered a refund or replacement, which was top notch !
I got the refund and ordered another UM at a later time, sadly, this sub had the SAME issue, as if it was a mfg error.
While I'm not saying all the UM subs are bad, 2 out of 2 were for me.
I live in South America, so it takes quite a while for me to get my orders, but I do business with a reliable freight-forwarder,
my packaging never came damaged.
However, it did however made me think again about buying another UM. While reading the comments-section of the UM subs
on the PE site, I did notice some more buyers with the very same issue. I hope it has since been resolved.

So if the UM is better, I hope the build-quality and their parts are also...
Cheers guys !
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post #22 of 1143 Old 11-16-2015, 09:43 PM
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Quote:
Originally Posted by rhodesj View Post
The HT18 has less usable Xmax, lower power handling, high inductance, weaker motor, and super high Qts that makes it best suited for IB.
The SI HT-18 has an EBP of 21.5 and the Ultimax has an EBP of 31.5. Also the HT-18 has a Qts of 0.383 and the Ultimax has a Qts of 0.533. Now which one has the "super high Qts"?
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post #23 of 1143 Old 11-17-2015, 12:17 AM
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Quote:
Originally Posted by tuxedocivic View Post
Well, considering he once told me I'm the kind of person that makes people want to leave forums like AVS, I'm not surprised he has some enemies.

That's absolutely one of the most absurd things I've ever heard Ryan, you're one of the most helpful guys on AVS.
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post #24 of 1143 Old 11-17-2015, 12:28 AM
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Quote:
Originally Posted by Electrodynamic View Post
The SI HT-18 has an EBP of 21.5 and the Ultimax has an EBP of 31.5. Also the HT-18 has a Qts of 0.383 and the Ultimax has a Qts of 0.533. Now which one has the "super high Qts"?
i suspect that he was referring to the one that he measured:


https://www.avsforum.com/forum/155-di...arameters.html

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post #25 of 1143 Old 11-17-2015, 06:30 AM
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Quote:
Originally Posted by Electrodynamic View Post
The SI HT-18 has an EBP of 21.5 and the Ultimax has an EBP of 31.5. Also the HT-18 has a Qts of 0.383 and the Ultimax has a Qts of 0.533. Now which one has the "super high Qts"?
Quote:
Originally Posted by LTD02 View Post
i suspect that he was referring to the one that he measured:


https://www.avsforum.com/forum/155-di...arameters.html
Electrodynamic, I think your math is off (or a typo) on the HT18 EBP, I get 41.5 for your published TS parameters on the HT18 D2. I think 41.5 EBP is better for the point you're trying to make anyways.

Correct, LTD. Those are my measurements from a D4 purchased last year. AlphaG also used a DATS to measure HT18 D4s that he purchased within the past two months and got results that I'd say were consistent with mine. SI did not publish official TS parameters for the D4 that I'm aware of, and I don't know of any independent measurements of a recent production HT18 D2.

From my measurements of the D4, I get 25.4 EBP, .659 Qts. Also, BL^2/Re on the D4 is much lower than the published values for the D2, 110.9 for the D2, 73.3 for the D4. Both of which are less than the UM18 at 129.4.

So with that said, I think my statement comparing the HT18 and UM18 is fair.
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post #26 of 1143 Old 11-17-2015, 09:09 AM
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Dude, he made the driver. I'm sure he is quite versed in it's own performance and electro-mechanical properties.

Everybody is an expert.
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post #27 of 1143 Old 11-17-2015, 11:13 AM
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Of course the UM18 was better, it was ~$100 more at the time it released. If you look at that by percentages, it's a pretty sizable cost difference (although if going flat pack, the cost difference shrank quite a bit thanks to the combo pack at parts-express). Considering the cost difference, I thought it was closer than one would have expected personally.

That said, I'm curious to see how this new driver performs. Not that I'm changing drivers any time soon, but I'm extremely interested to see what Nick can do at the same price point.
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post #28 of 1143 Old 11-17-2015, 12:16 PM - Thread Starter
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Quote:
Originally Posted by STL D View Post
Of course the UM18 was better, it was ~$100 more at the time it released. If you look at that by percentages, it's a pretty sizable cost difference (although if going flat pack, the cost difference shrank quite a bit thanks to the combo pack at parts-express). Considering the cost difference, I thought it was closer than one would have expected personally.

That said, I'm curious to see how this new driver performs. Not that I'm changing drivers any time soon, but I'm extremely interested to see what Nick can do at the same price point.
+1. Regardless of things, I look forward to see how these new subs compare
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post #29 of 1143 Old 11-17-2015, 12:20 PM
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That was the cutest little trainwreck I have ever seen Chap
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post #30 of 1143 Old 11-17-2015, 12:29 PM
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That was the cutest little trainwreck I have ever seen Chap




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