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Old 30th November 2010, 07:23 PM   #21
epa is offline epa  Netherlands
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Quote:
Originally Posted by CRESCENDO View Post
Thanks for running those scans. As we can see, 30Hz reproduction would be valuable in my case.

Also, I further see the value in high efficiency designs, even if a single cab doesn't grab the low end - your Xoc1.m sample above proves it's flat to 30Hz w/4 cabs

What program are you using to scan the files?
i use cool edit.

here is a good compromise.
ruff sketch stil need some work ~510 ltrs
if u later decide to ad a 3rd sub it wil go straigt to 30

Click the image to open in full size.

Last edited by epa; 30th November 2010 at 07:27 PM.
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Old 30th November 2010, 09:21 PM   #22
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More Lows.zip
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Old 1st December 2010, 02:01 AM   #23
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I'm impressed by some of the CAD horn foldings in this thread. What are you guys using (Xoc1 in particular)?
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Old 1st December 2010, 08:53 AM   #24
jwmbro is offline jwmbro  United States
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Quote:
Originally Posted by epa View Post
no ,its just easy'er to use in csa stacks if they are symetrical.
Hi, I have a question regarding CSAs. Jbell often talks about the directivity of tapped horns, is it necessary to use THs in a CSA? Is their inherent directivity not enough? How many dB rear wave reduction can you expect with a CSA, compared to that of a TH?

In general, nice thread crescendo, always good to see designs capable of reproducing dubstep basslines.
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Old 1st December 2010, 02:11 PM   #25
Xoc1 is offline Xoc1  United Kingdom
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Originally Posted by jason_watkins View Post
I'm impressed by some of the CAD horn foldings in this thread. What are you guys using (Xoc1 in particular)?
I Jason
I use Dessault Systemes Solidworks - 3D parametric CAD
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Old 1st December 2010, 02:20 PM   #26
epa is offline epa  Netherlands
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Quote:
Originally Posted by jwmbro View Post
Hi, I have a question regarding CSAs. Jbell often talks about the directivity of tapped horns, is it necessary to use THs in a CSA? Is their inherent directivity not enough? How many dB rear wave reduction can you expect with a CSA, compared to that of a TH?

In general, nice thread crescendo, always good to see designs capable of reproducing dubstep basslines.
u can use csa for bas steering and/or rear wave reduction
but usually only necessary in medium to large array's (> 6 cabs per side)
there are multyple ways to get there.
here are some intresting links.
bass guide.pdf (application/pdf-object)

Bass Here, Not There: Directional Low Frequency


TI330_1.2E.PDF (application/pdf-object)

Quote:
Originally Posted by jason_watkins View Post
I'm impressed by some of the CAD horn foldings in this thread. What are you guys using (Xoc1 in particular)?
i use autocad 2011

Last edited by epa; 1st December 2010 at 02:22 PM.
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Old 1st December 2010, 03:04 PM   #27
epa is offline epa  Netherlands
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Quote:
Originally Posted by CRESCENDO View Post
im gona have surgery tomorow,if al go's wel ill be back in a few days.
justin check out post 21 ,i think its a good compromise.model it and see.

the lows
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Old 1st December 2010, 03:44 PM   #28
epa is offline epa  Netherlands
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Quote:
Originally Posted by jwmbro View Post
Hi, I have a question regarding CSAs. Jbell often talks about the directivity of tapped horns, is it necessary to use THs in a CSA? Is their inherent directivity not enough? How many dB rear wave reduction can you expect with a CSA, compared to that of a TH?

In general, nice thread crescendo, always good to see designs capable of reproducing dubstep basslines.
and this one
wp - Subwoofer Arrays v04 .pdf (application/pdf-object)
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Old 1st December 2010, 08:17 PM   #29
MaVo is offline MaVo  Germany
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Just a tiny reminder, that the models we use (hornresp and akabak) are only so accurate and reality often differs from the model... it could be lost time to argue about minimal differences between designs. Building a "beta" box and seeing how far reality correlates with the simulation should be more rewarding.

From experience (listening and looking at alot of spectral data), i can tell that a 30hz cutoff is great for dubstep. Nothing of interest in the 20s at all (some rare exceptions do exist, but in those cases the lowest note usually has at least a first harmonic, which makes its fundamental hard to hear anyway since our hearing is pretty bad that low) and even the low 30s are less important than the area between 40 and 50, spoken from a statistical perspective.

Of course, i dont want to spoil the fun. And besides, i love those folding schemes. It makes me want to build a sub

Last edited by MaVo; 1st December 2010 at 08:27 PM.
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Old 2nd December 2010, 05:21 AM   #30
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Originally Posted by epa View Post
im gona have surgery tomorow,if al go's wel ill be back in a few days.
justin check out post 21 ,i think its a good compromise.model it and see.
I'm really liking that compromise!

Hope the surgery isn't anything tooo major. We all here wish you a safe surgery and a speedy recovery!!
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