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Forum: DIY Speakers and Subs   07-09-2014, 11:53 AM
Replies: 120
Views: 3,911
Posted By dominguez1
I do not doubt at all that my theory could be...

I do not doubt at all that my theory could be wrong and appreciate your test. However, I personally don't believe your test is credible enough to prove the contrary as I'm not convinced your test and...
Forum: DIY Speakers and Subs   07-09-2014, 10:58 AM
Replies: 120
Views: 3,911
Posted By dominguez1
Yes. I only played a 15hz sine wave to eliminate...

Yes. I only played a 15hz sine wave to eliminate any other frequency coloration in the test. I played them both at the same SPL for both the sealed and the ported. Pics, videos, and graphs of the...
Forum: DIY Speakers and Subs   07-09-2014, 10:54 AM
Replies: 46
Views: 730
Posted By dominguez1
Actually at 16 and 20hz, bass is right, only ~5db...

Actually at 16 and 20hz, bass is right, only ~5db difference compared to what he has now. He has the equivalent of 22 18in SIs in his room. Moving to the Ghorns would give him the equivalent of 38.2...
Forum: DIY Speakers and Subs   07-09-2014, 10:34 AM
Replies: 120
Views: 3,911
Posted By dominguez1
Thanks for the additional detail...charts make a...

Thanks for the additional detail...charts make a lot more sense now. :)

Unfortunately, I don't have the scientific chops (know how) to determine if a driver can be used as a velocity microphone. I...
Forum: DIY Speakers and Subs   07-07-2014, 08:10 PM
Replies: 36
Views: 905
Posted By dominguez1
I think you should start with building a similar...

I think you should start with building a similar riser as this:

http://www.avsforum.com/forum/155-diy-speakers-subs/1507428-follgott-s-build-18-x-peerless-xxls12-3.html#post24226660

A passive...
Forum: DIY Speakers and Subs   07-07-2014, 07:47 PM
Replies: 120
Views: 3,911
Posted By dominguez1
This is very interesting...it would be great to...

This is very interesting...it would be great to have a simple solution like this that is precise enough to rely on its measurements. Admittedly I am no physicist, but this does seem a bit rudimentary...
Forum: Subwoofers, Bass, and Transducers   07-07-2014, 07:20 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
Well, to be fair, I did miss the 10hz output, but...

Well, to be fair, I did miss the 10hz output, but still not bad.
Forum: DIY Speakers and Subs   07-07-2014, 06:59 PM
Replies: 120
Views: 3,911
Posted By dominguez1
Yes, in typical setups this would be the case. ...

Yes, in typical setups this would be the case.

However, in my test, I played a 15hz sine wave at the same SPL, so that eliminates the possibility there.
Forum: Subwoofers, Bass, and Transducers   07-07-2014, 06:54 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
Yes it did: ...

Yes it did:

http://www.audioholics.com/subwoofer-reviews/sb13-ultra-subwoofer/GSB13UCEA2010.png/image_preview

Here is the estimate we had for it prior to Josh's testing:
...
Forum: Subwoofers, Bass, and Transducers   07-07-2014, 06:46 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
I'm guessing that it will, from a tactile...

I'm guessing that it will, from a tactile feedback standpoint. Same SPL, but more tactile feedback.

You're on a riser now though, so make sure you do some critical listening on the riser so you...
Forum: DIY Speakers and Subs   07-07-2014, 06:37 PM
Replies: 120
Views: 3,911
Posted By dominguez1
I don't know how to interpret particle velocity...

I don't know how to interpret particle velocity in the graphs you posted? Where is it represented in the graph?

I can't imagine that REW is calculating particle velocity (accurately at...
Forum: DIY Speakers and Subs   07-07-2014, 11:12 AM
Replies: 120
Views: 3,911
Posted By dominguez1
I agree that there is no difference in sound...

I agree that there is no difference in sound field itself between ported and sealed. The theory is that ported produces more particle velocity in the nearfield, causing more sound intensity compared...
Forum: Subwoofers, Bass, and Transducers   07-07-2014, 08:56 AM
Replies: 17,355
Views: 1,059,126
Posted By dominguez1
If you do, don't bother with the side theaters. I...

If you do, don't bother with the side theaters. I bet the xd theater is good...or at least I hope!
Forum: DIY Speakers and Subs   07-07-2014, 05:34 AM
Replies: 120
Views: 3,911
Posted By dominguez1
I also tested ported vs sealed in my room here: ...

I also tested ported vs sealed in my room here:

Ported vs Sealed PVL test (http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1488059-your-home-theater-ulf-score.html#post23676274)

I...
Forum: Subwoofers, Bass, and Transducers   07-06-2014, 10:12 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
New member score format: Separated DIY and...

New member score format:

Separated DIY and Commercial HT systems. (You are DIY if you have any sub that cannot or could not be bought commercially.)
...
Forum: DIY Speakers and Subs   07-06-2014, 08:17 PM
Replies: 55
Views: 885
Posted By dominguez1
I think you're going down the right path! I...

I think you're going down the right path! I personally wouldn't add shakers unless a last resort...the natural shake is the most realistic to me. Crowsons come damn close...and do a great job in the...
Forum: Subwoofers, Bass, and Transducers   07-06-2014, 07:47 PM
Replies: 17,355
Views: 1,059,126
Posted By dominguez1
Watched HTTYD2 at a Cinemark Nexgen theater...

Watched HTTYD2 at a Cinemark Nexgen theater (non-3d).

This theater is less than a year old, so I thought it would have the latest and great audio and video.

At this theater, is was a complete...
Forum: DIY Speakers and Subs   07-06-2014, 07:27 PM
Replies: 55
Views: 885
Posted By dominguez1
Definitely don't need anything from an SPL or...

Definitely don't need anything from an SPL or pressure perspective!

I do think some adding some near field ported subs will up your "tactile feedback" HT experience that much more though!

I sit...
Forum: DIY Speakers and Subs   07-06-2014, 06:23 PM
Replies: 55
Views: 885
Posted By dominguez1
I'd highly recommend starting with the rear subs...

I'd highly recommend starting with the rear subs first...and then if not enough, port your IB.

My guess would be that the rear ported subs nearfield would do it for you...

Porting your IB may...
Forum: DIY Speakers and Subs   07-06-2014, 05:53 PM
Replies: 55
Views: 885
Posted By dominguez1
MK, are you still going to build these in...

MK, are you still going to build these in addition to porting your IB???
Forum: DIY Speakers and Subs   07-06-2014, 05:15 PM
Replies: 120
Views: 3,911
Posted By dominguez1
Interested to see your results and your test...

Interested to see your results and your test methodology. I believe my original tests...
Forum: Subwoofers, Bass, and Transducers   07-06-2014, 02:59 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
Version 14.4 of the ULF Calculator now available...

Version 14.4 of the ULF Calculator now available (Post 1)


Added Mal-X21 Estimate
Modified PSA XV15SE estimated output
Added Infinity 1260w estimate


Below is the latest member score...
Forum: Subwoofers, Bass, and Transducers   07-06-2014, 02:51 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
Jbrown15, Here is your updated ULF score...

Jbrown15,

Here is your updated ULF score from bassthathz's sim (post 2026) of your system. The 10hz looks more realistic now as its below its sealed counterpart.
...
Forum: Subwoofers, Bass, and Transducers   07-06-2014, 02:49 PM
Replies: 2,100
Views: 58,403
Posted By dominguez1
Rhed, Too difficult to tell from the chart...

Rhed,

Too difficult to tell from the chart because of the scale. 5hz is really a question of signal chain if you have enough fire power. It looks like you're down 10db at 5hz from 10hz...
Forum: DIY Speakers and Subs   07-06-2014, 06:12 AM
Replies: 511
Views: 19,099
Posted By dominguez1
Very cool! Did you even know the dts guys or was...

Very cool! Did you even know the dts guys or was that totally out of the blue?
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