Stereo Integrity's new HT Subwoofer - Page 4

And, apparently in one man's opinion, how the soft parts are assembled is irrelevant. That's my favorite news so far in this thread.

Lol

Now that we have T/S I have to sim them.

Nice! Can you post up a sim in the for my 3ft^3 request as well?

Look at pages two and three. Sims have been up.

Ok, thanks.

I noticed those before I asked. However, I didn't know how that sim would change based on using a much smaller box. Looking at the SI website they recommend 6ft^3 sealed for the 18" so I assumed this enclosure volume was used in the modeling. I have some pre-built 3ft^3 boxes and I figured the modeling would change pretty significantly from the graphs already posted.

I've seen on some graphs you post how you indicate the power level required to reach xmax at "XX" frequency given different enclosure sizes.

That is what I was looking for.

Here ya go. 3cuft model.



Looks fine.

That is certainly a nice way to take the comment out of context.

One incredibly MINOR detail regarding the soft parts (especially on a prototype) is irreverent, yes. The overall manor in which all of the soft parts are put together (final assembly) is what is important -- and is completely unrelated to the aforementioned minor detail.

It's analogous to looking at a prototype car... noting that a single piece, lets say a soft top convertible cover, has a few stitches out of line... then assuming the manufacturer doesn't know how to put the motor and suspension together.

lol at the convertible top car analogy.

Stitching is irrelevant incredibly MINOR detail, yeah, I got that from your previous comment.

I'd agree that it's all-but inconsequential to a non production unit (for many reasons). Might not make potential vendors and customers excited to see it, but then again, that's why MOST prototypes and pre-production mock ups never see the light of the consumer day.

If it's occurring on customer/dealer bound product, that's a completely different issue.

James

I don't see the problem here...he's saying you can't look at a PROTOTYPE and draw conclusions based on that. There's a poster in this thread who actually has one (baniels, I believe) and he has pics of the driver posted on his website. The stitching looks perfectly fine to me. I don't have enough expertise to divine the performance of a driver based on pics of it, so I'll leave that to others. But Josh's preliminary testing seems to be promising.

For what little it may be worth, the stitching on my 18" D2 is fine. It stays on the surround all the way around. There is some fluctuation in the distance from the edge of the seam to the edge of the surround, so I can see that if whomever/whatever is doing the stitching loses focus, it could turn out wrong.

Damn, you'll pick a fight with anybody lately.

Please do us all a favor and step away from the keyboard, go have a beer and rub one out.

On topic, as usual. Especially like the "us all" part.

Are you going to measure this driver / box configuration outside and post the results on Data-Bass?

Josh hinted that he may test the Dayton 18HO this weekend. Let's hope he has enough time and good weather to do both the Dayton and this Stereo Integrity.

Both T/S's (the SI HT 18" and the Dayton RS-18") are posted on Josh's web site.

Sorry. What I meant was that he was going to test them in box.

Obviously we have the T/S now as I and others have posted several models already using them in this thread even.

I'd even settle for a close mic sweep of it in the box. The T/S parameters indicate a significant impact of inductance on the net response. Josh thinks there are measures in the motor design that will mitigate or minimize the impact of the inductance. Well, he's the only one with a driver (that I know of) so it'd be nice to see confirmation one way or the other.

I am also interested in seeing how the Dayton HO18 compares to the Stereo Integrity! For those that know how the T/S parameters work, how do they compare based on those?

Anyone else having a problem getting to the SI website?

Works OK for me.

Strange, I can't open the site on my laptop or my iPhone .

Does anyone know when these SI subs will start shipping?

They seem to model VERY similar from what I've looked at so far.

Anyone have an updated ETA of these? I'd love to try to scoop up a pair within the next 2-3 weeks.

Based on the information posted on HTS they're hoping to get them before Christmas, but things get backed up around the holidays so that might not happen.

I'm still curious to know why Josh went silent on the 18" SI HT driver. He posts T/S measurements on Data-Bass that suggest significant effects of inductance on the driver's response unlike SI's T/S specs. He then tells us he doesn't think the T/S measurements accurately predict the response of the driver due to inductance control measures in the motor. Then we get crickets. Not even a close mic sweep of the driver in his test box to show us that his measured T/S parameters don't predict the driver's response and confirm his belief. Meanwhile Nick has posted some Klippel graphs of the 18" SI HT driver on the SI site, but not the full report. Maybe the full report is still coming...

I'm not trying to spin this into some giant conspiracy theory, but frankly I don't have a clue how these SI HT drivers are actually going to perform. I've got a buddy looking to buy 4 15" drivers for a twin dual opposed build and it's down to the 15" SI HT and the 15" Dayton Titanic Mk III. Unless more information is forthcoming he's going with the Dayton. I can't suggest someone buy a product with unknown performance even if it might be a great deal.

Coulda fooled me...

Nick sends his driver in to get Klippel tested and posts the results which is way more info than available for 99% of the stuff on the market but yet there is something fishy about that because more info wasn't shown?

I apologize for not being fast enough to get finished with the SI woofer tests for your tastes. I'm not sure what your expectations are here. You should probably greatly lower your expectations of the rapidness of completing measurements for DB. I have not posted anything because I don't have anything else to add at this time. Funny thing is Nick who is actually producing these woofers has shown way more patience.

I'd just like to get a few shipped to me so we can do some head-to-head comparisons against the 18" HO's at Gorilla's. I'm planning on starting a box this weekend, but if I can't get the drivers before the 15th, I'm not going to bother with it. Especially because I have no intent of keeping them. I think some unbiased, objective, n-room testing will be a great contribution to the community. I know someone would end up doing it soon enough, but sooner that later sounds great to me.

I'll try to get in touch with Nick and cross my fingers.

I haven't suggested any sort of collusion between you and Nick to withhold information. Hence why there's no conspiracy.

My point, which you seem to have completely missed, by focusing on things I didn't say is that we still don't have any idea yet how the driver will actually perform in a box. There are two sets of T/S parameters that are fairly different from one another. They suggest pretty different things. You went on to undermine your own T/S measurements (which Nick reported first) by saying you don't think they will accurately predict how the sub will perform. Well, you have (had?) the driver. Why didn't you bother to confirm your belief by putting it in a box and measuring it? You managed to measure acquire, characterize the 18" Dayton HO, and set off a buying frenzy in this subforum in the same general time frame. That driver got the rapid treatment at DB.

Yes, we have 4 graphs from a Klippel report. Yes, most manufacturers don't provide Klippel or Dumax reports. However... Those 4 graphs still don't do anything to tell me how the driver is going to actually perform in a box because the small signal, large + cold, and large + warm "T/S" parameter portion of the Klippel report wasn't posted. Maybe Nick doesn't have the whole report yet. I'm just trying to get more information so I can figure out what whether the driver is the steal of the year or just an also ran.

Edit: Last sentence for grammatical error.
Edited by Stereodude - 11/23/12 at 11:50am