Stereo Integrity HT-18 v2 18" available again May-23-2017 - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 153 Old 05-04-2017, 09:09 AM - Thread Starter
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Stereo Integrity HT-18 v2 18" available again May-23-2017

Although I am not in the market, it looks like these sold well enough that SI is receiving another production run of these at $149 shipped.

http://stereointegrity.com/product/ht18-v2-subwoofer/

In the event anyone is in need.
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post #2 of 153 Old 05-04-2017, 09:22 AM
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Lol, didn't see that coming 6 months ago.
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post #3 of 153 Old 05-04-2017, 09:22 AM
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Whoo Hoo!
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post #4 of 153 Old 05-04-2017, 09:22 AM
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HT18 Dual 2 ohm voice coils
Re3.6 ohms
Fs21 Hz
Qes0.47
Qms3.9
Qts0.42
Le5.1 mH
Sd117841 mm^2
Vas299.3 L
Bl19.3
Mms416 g
Cms357.3
Sensitivity (1w/1m)89.7 db
Xmax22.5 mm

Sent from my SM-N900V using Tapatalk
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post #5 of 153 Old 05-04-2017, 09:26 AM
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post #6 of 153 Old 05-04-2017, 09:46 AM
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Quote:
Originally Posted by notnyt View Post
Lol, didn't see that coming 6 months ago.
Well we were talking about it six months ago so you should have seen it coming, haha.
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post #7 of 153 Old 05-04-2017, 09:52 AM
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Quote:
Originally Posted by corradizo View Post
HT18 Dual 2 ohm voice coils
Re3.6 ohms
Fs21 Hz
Qes0.47
Qms3.9
Qts0.42
Le5.1 mH
Sd117841 mm^2
Vas299.3 L
Bl19.3
Mms416 g
Cms357.3
Sensitivity (1w/1m)89.7 db
Xmax22.5 mm

Sent from my SM-N900V using Tapatalk
I have the worst luck entering in SI drivers. What order did you enter them in.

I tried: Qes, Qms,Vas, Fs, Re,Le,Sd, Xmax, Pe.
Then tried: QMS, MMS, CMS, RE, BL, LE, SD, XMAX, PE

Each time the other non-calculated parameters were way out of whack.

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post #8 of 153 Old 05-04-2017, 09:53 AM
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Oh cool, I'm honestly tempted for a couple of these, especially for a nearfield setup.

Especially after seeing a lot of builds involving their drivers.
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post #9 of 153 Old 05-04-2017, 09:53 AM
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Quote:
Originally Posted by uniquepattern View Post
Wow, don't bother trying to pre-order if your in Canada.... Sundowns site wants over $2k for shipping 8 of em up here.... Fed-Ex international econo....


Guess Ill have to call Nick if I want a few...
What about 4 UM-18s?

If ported, maybe the DCS450 over at PE would be a good option. Especially 8 of them.

Worried about how these will do sealed
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post #10 of 153 Old 05-04-2017, 09:57 AM
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Quote:
Originally Posted by tjcinnamon View Post
I have the worst luck entering in SI drivers. What order did you enter them in.

I tried: Qes, Qms,Vas, Fs, Re,Le,Sd, Xmax, Pe.
Then tried: QMS, MMS, CMS, RE, BL, LE, SD, XMAX, PE

Each time the other non-calculated parameters were way out of whack.
This is my .wdr for use with WinISD 0.7.0.900

Rename to .wdr
Attached Files
File Type: txt SI HT18 v2 D2.txt (827 Bytes, 187 views)
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post #11 of 153 Old 05-04-2017, 10:22 AM
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Quote:
Originally Posted by corradizo View Post
This is my .wdr for use with WinISD 0.7.0.900

Rename to .wdr
Thanks!

Odd that the CMS and MMS are no where near what is published.

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post #12 of 153 Old 05-04-2017, 10:42 AM
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Quote:
Originally Posted by tjcinnamon View Post
I have the worst luck entering in SI drivers. What order did you enter them in.

I tried: Qes, Qms,Vas, Fs, Re,Le,Sd, Xmax, Pe.
Then tried: QMS, MMS, CMS, RE, BL, LE, SD, XMAX, PE

Each time the other non-calculated parameters were way out of whack.
There is a help page link in the software that explains the order to enter the parameters:

The suggested procedure for entering driver parameters is following (check first that "Auto calculate unknowns" option is checked):

1. Enter Mms and Cms

This gives fs. If either is not available, then enter fs and other parameter.

2. Enter Sd, Bl and Re

Now, you should get all but Qms (and Qts), Vas. Please note that Vas may not match exactly what is specified by manufacturer, because exact value of Vas depends on environmental parameters. See FAQ.

3. Enter Rms or Qms.

Either one will do, although I tend to prefer Qms over Rms, because it can usually be measured in driver measurement procedures.

4. Enter Hc, Hg and Pe.

If Hc or Hg or either is available, then enter Xmax and optionally either Hc or Hg if available.

5. Enter number of voicecoils.

This procedure is most accurate. Also note that it also calculates true SPL (1W/1m) value. So it might not match the marketing SPL value, which is generally somewhat vague. Not in all cases, though.

6. Correct Znom, if necessary.



There seems to be a problem with Fs and CMS. When Fs is 21 as per spec, I am seeing a calculated value for CMS of 138.1. Everything else seems to match up. Be sure the units in Winisd are correct, which can be a problem when manufacturers don't specify, but if you get weird results, it is likely a units discrepancy. Just click on the unit description to change it.
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post #13 of 153 Old 05-04-2017, 12:17 PM
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We just fixed Mms and Cms as those were the same numbers from the previous driver. Numbers should match up much better now. My apologies.
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post #14 of 153 Old 05-04-2017, 12:23 PM
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@Electrodynamic


Nick,


Any plans for a D4 version? I have an HT15 and an HT18, wanting to upgrade the 15 to 18 without changing amps.

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post #15 of 153 Old 05-04-2017, 12:28 PM
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@Electrodynamic


Nick,


Any plans for a D4 version? I have an HT15 and an HT18, wanting to upgrade the 15 to 18 without changing amps.
These drivers are going to be Dual 2 Ohm.

Dual 2 Ohm for now. We will monitor interest for Dual 4's and go from there.
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post #16 of 153 Old 05-04-2017, 01:42 PM
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WOAH! WinISD defaults to 6 for sealed and 12 for vented. I can see how these differ from the HST18's. Likely box size and max SPL.

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post #17 of 153 Old 05-04-2017, 01:44 PM
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Stereo Integrity HT-18 v2 18" available again May-23-2017

this HT18v2 in a 13 cubic ft box internal after driver and bracing.
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post #18 of 153 Old 05-04-2017, 02:28 PM
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Quote:
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Well we were talking about it six months ago so you should have seen it coming, haha.
For some reason I derped and confused this with the ds4 18 lol. These going to remain in production a bit?
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post #19 of 153 Old 05-04-2017, 03:57 PM
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Dude Fedex just delivered 4 PA 460 drivers yesterday for me. I guess I figured the si18 drivers were gone for good.
Anyway glad they are back and shipping. You are making some bass heads dream a reality.
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post #20 of 153 Old 05-04-2017, 04:10 PM
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post #21 of 153 Old 05-04-2017, 04:11 PM
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Stereo Integrity HT-18 v2 18" available again May-23-2017

Quote:
Originally Posted by jake515 View Post
Dude Fedex just delivered 4 PA 460 drivers yesterday for me. I guess I figured the si18 drivers were gone for good.

Anyway glad they are back and shipping. You are making some bass heads dream a reality.


Jake 4 pa460's nearfield and 8 ht18v2's up front. Now we're talking!
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Last edited by eng-399; 05-05-2017 at 08:48 AM.
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post #22 of 153 Old 05-04-2017, 04:13 PM
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Ill bite. Ill get 2 of the SI 18v2 farfield in a cyclops enclosure and use the 3 PA460 nearfield and retire the INFINITYS.
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post #23 of 153 Old 05-04-2017, 04:36 PM
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And our first battle for bass for the dollar has presented itself. 2 SI HT18 vs. 3 Dayton PA460. Go!

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If you consider a decent amount of box size say 30cuft total for the 2 or 3 drivers and tune the PA460 low (say 21hz) the 3 PA460s will equal or beat the 2 HT18v2s (tuned @ 14hz) from about 19hz up below that the SIs will have more output.

In the end it is mid-bass vs sub-sonic frequencies.

On the amplification side the DVC 2 ohm SIs don't match well with the Inukes (we are talking BUDGET here) since at 4ohms a side the 3000 can't fully power the HT18v2. If the SI were available with 4ohm VCs then I would probably call it the budget winner as it is they are a draw until one decides how much they value <20hz vs >40hz.

EDIT: just buy 2 of each, build and tune them where they are happiest and let them eat.
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post #25 of 153 Old 05-04-2017, 06:28 PM
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Ill bite. Ill get 2 of the SI 18v2 farfield in a cyclops enclosure and use the 3 PA460 nearfield and retire the INFINITYS.
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post #26 of 153 Old 05-04-2017, 06:55 PM
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For some reason I derped and confused this with the ds4 18 lol. These going to remain in production a bit?
Yes sir. This new version is sustainable long-term.
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post #27 of 153 Old 05-04-2017, 06:58 PM
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I live way down in south Texas. McAllen,Texas. I have 6-1262ws. Im thinking of putting 2 in my living room down fire ported with an inuke 1k dsp. And the other 4. Well who knows. I have all the original boxes so i might just store them. You need some?
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post #28 of 153 Old 05-05-2017, 05:04 AM
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Originally Posted by eng-399 View Post
@chadsmith013 @EnderShadow s
Infinity's ...
thanks Mike...appreciate the looking out.

will keep my eye on them...i placed an order with amazon for 2 of them..previously it said 1-2 months until shipped, but the other day it was updated to say 2-4 weeks..I still have my doubts they actually have them, but i placed the order..will see what happens..

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Surround Speakers :2 DIYSG Volt 6's
Subwoofers : Dual Dayton HO 18's in sealed cabs w/Inuke 3000 DSP
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post #29 of 153 Old 05-05-2017, 05:53 AM
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These drivers are going to be Dual 2 Ohm.

Dual 2 Ohm for now. We will monitor interest for Dual 4's and go from there.
Nick,

I think you should really consider a dual 4Ohm version. You could run 4 of them off one iNuke 6000dsp. That combo would make these the default bass per dollar champ IMO.
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post #30 of 153 Old 05-05-2017, 08:47 AM
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Jake 4 pa460's nearfield and 8 ht18v2's up front. Now we're taking
Its going to be a combo of 4 PA 460 in cubes and 4 si18 d4's in Johnnies with 88's for the LCR channels. This should get it done!
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