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using a wall of 15" woofers for bass. [message #60621]

Tue, 18 August 2009 02:16

noviygera
Messages: 23
Registered: June 2009
Location: United States

Chancellor

I have this idea to make a wall of woofers as a sub.
Lets say the wall behind my main speakers is 82" high x 86" wide. Speakers are placed about 5 feet into the room.

I can make a fake wall (big panel) that's 70" x 80" and 12" into the room. Essentially a big open baffle panel that's a foot from the wall. Then mount 5 15" woofers spaced closely from top to bottom (checker board pattern) behind each speaker.
Having a total of 10 15" woofers.
Woofers can be cheap 15" with Qts of about 0.6. and Fs about 30Hz, 93 db efficient. (around $20-$30 each on parts-express)

Anyone try this?
Is this a good idea to make good flat in room bass response?
Will there be a noticeable delay between wall woofers and mains?
How high can I crossover to mains? 70Hz? 120Hz?

-Herman

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Multisubs [message #60623 is a reply to message #60621]

Tue, 18 August 2009 10:12

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

I think it's a good idea. Do a search here about multisub configurations.

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Re: Multisubs/open baffle [message #60637 is a reply to message #60623]

Thu, 20 August 2009 21:38

noviygera
Messages: 23
Registered: June 2009
Location: United States

Chancellor

Did a search, read the articles downloaded "Edge" program to do a simulation. I ran into three issues:

1. My open baffle can be as tall as the basement height allows and therefore it can stand on the floor and go up to the ceiling, like a fake wall, making a vertical "short circuit" in the room. How do I properly enter this into the Edge program? "infinitely high and low baffle"?

2. The open baffle can be as close to the rear wall as the driver/mounting allows. What kind of effect will this have, do I need to somehow compensate for this effect or take into account when modeling in Edge? And will this work?

3. I can make the open baffle slightly LESS wide than the rear wall. I was thinking of making the open space to be the area of the driver cones. Is this a good idea?

Thanks,
Herman

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Re: Multisubs/open baffle [message #60638 is a reply to message #60637]

Thu, 20 August 2009 22:54

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

I don't use EDGE, so I'm no help there. Hopefully someone else that has experience with this program will chime in.

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Re: Multisubs/open baffle [message #60639 is a reply to message #60638]

Thu, 20 August 2009 22:57

noviygera
Messages: 23
Registered: June 2009
Location: United States

Chancellor

Maybe this is the case where I just follow my instinct, build my idea and report the result. Will do Smile

-Herman

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