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Old 2nd May 2013, 05:06 PM   #1
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Default Open baffle subwoofer

Hi,

Wondering if anybody ever tried building a stereo 15" open baffle suwoofer? How did it work out...

Thanks

Oon
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Old 2nd May 2013, 05:14 PM   #2
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Is it the kind of speaker you are looking for?!
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Old 2nd May 2013, 06:18 PM   #3
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OB or IB? OB won't get you much output down low....
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Old 2nd May 2013, 10:29 PM   #4
OllBoll is offline OllBoll  Sweden
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Quote:
Originally Posted by m R g S r View Post
OB or IB? OB won't get you much output down low....
You don't really need that much down low as long as it's music you want to listen too. I currently have 4x AE IB15 in W-frames and it's way way more output than I'll ever need. They are so overkill I'm currently planning to downgrade into smaller subs.
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Old 3rd May 2013, 12:12 AM   #5
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Take a fine 15 inch woofer with a 25 Hz resonance and put it in an irregularly shaped large sheet of wood (couple feet each way), and you'll have an excellent woofer. I'll see if I can find links to mine.

Any box will endow your speaker with undesirable sounds. So, boxless is best. I say that not as a partisan especially (like some threads here). The theory about boosting seems right, but in practice not needed if you are just aiming at lowest 2 octaves.

Ben
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Old 3rd May 2013, 12:55 AM   #6
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Post #1394 has freq response of my giant OB and a Klipschorn together.

Multiple Small Subs - Geddes Approach
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Old 3rd May 2013, 06:10 AM   #7
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Quote:
Originally Posted by OllBoll View Post
You don't really need that much down low as long as it's music you want to listen too. I currently have 4x AE IB15 in W-frames and it's way way more output than I'll ever need. They are so overkill I'm currently planning to downgrade into smaller subs.
I agree. Give me your 4 X IB15...

Oon
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Old 3rd May 2013, 06:29 AM   #8
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Hi Everyone,

Thanks for the all the reply. What I was planning is described in this thread. And

Slanting open baffles for Full rangers...

I am familiar with the open baffle sound. I have built one before.

Here is a short excerpt from the post:
I have been thinking about this design for a while. I wanted to make this speaker "futureproof", so after some thoughts, I was wondering if a single 15" woofer is enough for bass. So I figured that I should add in another 15" woofer just to make sure there is enough bass. After all the Jamo 909 had 2 woofers... So if I plan some material with a lot of bass, I would not run out of steam.

Thinking further, I was thinking what if I added the a subwoofer instead of a woofer, a 15" subwoofer at the bottom, a pro-woofer in the middle, the Audio Nirvana 15" fullrange at the top, followed by a supertweeter above that.

In short I already have plans for the typical standard approach for Bass , a 15" Pro-woofer in this project. Since there is still space in the baffle, why not add in a subwoofer.

It will e bi-amped by a home thearte amp.

So basically, I just wanted to know how the sub sounds like.

Any recomendation for subwoofer driver?

he AE is just a bit too expensive for the pockets.



Oon
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Old 3rd May 2013, 09:51 AM   #9
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Quote:
Originally Posted by Inductor View Post
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Is it the kind of speaker you are looking for?!
Dear Inductor,

It is very similar to what I intend to do. Except

1) my full range is also 15"
2) my woofer is a normal pro woofer from Celestion that has a +/- 3mm Xmax
3) My subwoofer will be at the lowest level.

Oon
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Old 3rd May 2013, 10:22 AM   #10
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HI everyone,

There are 2 drivers I am considering for Sub duty in the open baffle.

Option 1.
Dayton Audio IB385-8 15" Infinite Baffle Subwoofer 295-455

Was originally intended for Infinite baffle, so they would function quite similar. Almost ridiculous x-max at 14mm

Option 2

Dayton Audio DCS385-4 15" Classic Subwoofer 4 Ohm 295-206

What I like about it is the copper shorting ring, which should reduce distortion. And I believe increases damping. X-max is less though.

You are free to suggest other woofers, ideally a X-max of about 10mm, price range of about US$100 or so... I would rather keep my mass of the cone low, so something to the tune of 200 grams or less would be better..

Oon
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