New Approach for an Outline from a DIY Subwoofer - Precision Devices PD2150 inside - Page 2 - diyAudio
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Old 23rd September 2011, 07:41 PM   #11
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I had to laugh when I opened the boxes of my PD2150's. It was a shock.

The speaker sitting on the back of the PD is a 12" JBL 2206, a 4" voice coil pro driver.

Looking at the picture of the room with six of these in it just makes me say wow.
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Old 26th September 2011, 03:18 PM   #12
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Quote:
Originally Posted by 1audiohack View Post
I had to laugh when I opened the boxes of my PD2150's. It was a shock.
The speaker sitting on the back of the PD is a 12" JBL 2206, a 4" voice coil pro driver.
Looking at the picture of the room with six of these in it just makes me say wow.
This I have never see before and I want to know the theorie of operation from such thing.
Exist therefore a certainly term?
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Old 26th September 2011, 03:46 PM   #13
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HaHa, sorry tiefbassuebertr;

It is never operated this way. I placed the JBL for a size comparison, just to show the immensity of the PD2150. Some people think a 12" woofer is a big speaker, just the motor assembly of the PD is almost the size of an entire 12" pro driver.
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Old 3rd November 2011, 12:47 PM   #14
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Quote:
Originally Posted by 1audiohack View Post
HaHa, sorry tiefbassuebertr;

It is never operated this way. I placed the JBL for a size comparison, just to show the immensity of the PD2150. Some people think a 12" woofer is a big speaker, just the motor assembly of the PD is almost the size of an entire 12" pro driver.
---thank you. Perhaps you can send a second foto from both cones.

What happens, if there is epuipped with PD2150 a complete wall side (distributed over the entire surface) and you look the movie "IRON MAN"
Iron Man - Wikipedia, the free encyclopedia
by full audio power (check out this in no circumstances) ??
This question comes up in me by check a sub-sat system last weekend with this movie.
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Old 3rd November 2011, 03:52 PM   #15
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Default Bass Transmission Approach for all User without Carpentry Experience

On the attached pics you will find such an approach
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File Type: jpg Bilder301011 361.jpg (820.7 KB, 302 views)
File Type: jpg Bilder301011 362.jpg (908.0 KB, 269 views)
File Type: jpg Bilder301011 367.jpg (950.5 KB, 261 views)
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Old 4th November 2011, 10:39 AM   #16
Ile is offline Ile  Finland
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Looking good!

Using manifold installation for IB sub makes room look even cleaner because whole sub will be outside of room. Installing elements at opposite sides of manifold makes elements forces to cancel each other and wall doesn't flex.
IB subwoofer picture gallery page 1
IB subwoofer picture gallery page 2

Or you can use concrete.
Concrete IB subwoofer
(still under construction)

Last edited by Ile; 4th November 2011 at 10:44 AM.
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Old 4th November 2011, 11:59 AM   #17
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Quote:
Originally Posted by Ile View Post
Looking good!

Using manifold installation for IB sub makes room look even cleaner because whole sub will be outside of room. Installing elements at opposite sides of manifold makes elements forces to cancel each other and wall doesn't flex.
IB subwoofer picture gallery page 1
IB subwoofer picture gallery page 2

Or you can use concrete.
Concrete IB subwoofer
(still under construction)
Also good approach - thank you for sending this URLs
The term "INFINITE BAFFLE SUBWOOFER" (IB-SUB) was new for me and by google image search this is a very good keyword to find a lot of such constructions.

BTW - great work about
Concrete IB subwoofer
Viewed in terms of efforts similar like
http://www.wiretotheear.com/2009/12/...ubwoofer-ever/
and
http://www.royaldevice.com/custom3.htm
(second pic)

Last edited by tiefbassuebertr; 4th November 2011 at 12:06 PM.
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Old 4th November 2011, 03:33 PM   #18
Ile is offline Ile  Finland
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That horn sub was kind of inspiration to my own IB sub project.

IB Cult FAQ and forum have also been great source for me.

Last edited by Ile; 4th November 2011 at 03:35 PM.
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Old 7th November 2011, 05:22 PM   #19
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The image supplements from that one of post #1 (from the 1500 liter chamber in the attic) I have order in the meantime by the user. If I have receice, I will post it here. In this case I try to find comparable concepts by other user's by the use of follow term (keyword by google):

"IB sub in the attic"

As an example I find this:
Sub in the attic? - AVS Forum
and this both:
http://home.comcast.net/~infinitelyb...-Gallery3.html
http://home.comcast.net/~infinitelyb...B-Gallery.html
Are there basic articles about this kind of solutions ??

I ask this, because I miss the actually chamber (nearly free air condition and thus no wanted 24 db high pass filter character through certainly vented box alignment).
Basiclly I don't like 12 db high pass character in this frequency aera by the possibility for realizing large chambers. Only in case of low volume chamber the closed box 12 db character (and no vented box 24 db character) is to prefer from my view.

Last edited by tiefbassuebertr; 7th November 2011 at 05:32 PM.
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Old 8th November 2011, 08:32 PM   #20
Ile is offline Ile  Finland
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Those vent looking openings at ceiling (some have grilles) are for manifolds. Even there is manifold used for elements installation, those are sealed and there will be 12 db roll off.
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