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#192626 - 01/16/08 10:08 PM Re: Where to place additional subs? [Re: SirQuack]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10412
Randy, there're a couple reasons for not being so concerned about precise placement that you'd consider suspending one of your subs: first, an examination of the both the null and cancellation diagrams in the article shows that they don't suddenly go from one extreme to the other, but instead follow gradual curves. So, if placement was a little bit away from the point of max null or max cancellation there would still be benefit. Second, your room isn't completely rectangular and the modes in an irregular room have a somewhat different distribution and are a lot more difficult to calculate, as some online sources show. It could be reasoned that placing your back sub farther to the right, more nearly in the middle of the back wall rather than directly opposite the front sub, would more closely coincide with a null in the rear area.
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#192628 - 01/16/08 10:26 PM Re: Where to place additional subs? [Re: JohnK]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
Thanks everyone for the help, it is much appreciated. Since my HT area is in the top/left corner of the overall room, I've been trying to imagine how that compares to a rectangular or square room.

Also, between the bar and the wall is a large entryway/hallway (8ft wide) that leads to the otherside of the basement which includes the stairway, bedroom, bathroom, and storage rooms. Overall Sq Ft is 2100sq ft.

The 6 ft bump out wall which makes up my AV closet was actually built by me to help set back the projection screen from the rest of the room. In reality, the room was like 31ft x 30ft before I added that bump out area. I'm sure I will have to experiment to find the best position.

I just need to figure out what I'm going to do.... \:\)
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#192646 - 01/16/08 11:36 PM Re: Where to place additional subs? [Re: RickF]
CV Offline
Founder, Axiom Upgrade Club
shareholder in the making

Registered: 07/20/06
Posts: 11271
Loc: Richland, WA, USA
 Originally Posted By: RickF
Didnt we have a poster here at one time who had his 80s hanging from the ceiling and one of those built in subs ... what are they called?


I remember the M80s hanging from the ceiling.

I don't know what subwoofer you're talking about being built-in, but you made me think of the Thigpen Rotary Woofer, which "must be professionally installed in an attic or basement which becomes an infinite baffle." Does anyone on the board actually have experience with those?

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#192670 - 01/17/08 06:36 AM Re: Where to place additional subs? [Re: St_PatGuy]
MarkSJohnson Offline
shareholder in the making

Registered: 09/27/04
Posts: 10965
Loc: Central NH
 Originally Posted By: St_PatGuy
Pictures would be a requirement--not of the finished product, but the journey there.

And some from the ER visits as well....just in the interest of keeping the photo essay complete!
_________________________
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::

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#192693 - 01/17/08 10:36 AM Re: Where to place additional subs? [Re: MarkSJohnson]
St_PatGuy Offline
axiomite

Registered: 03/07/05
Posts: 7413
Loc: Glendale, Arizona
Good thinking, Mark!
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"Nothin' up my sleeve. . ." --Bullwinkle J. Moose

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#192698 - 01/17/08 11:17 AM Re: Where to place additional subs? [Re: CV]
terzaghi Offline
connoisseur

Registered: 04/04/07
Posts: 4848
Loc: Tulsa, Oklahoma
 Originally Posted By: CV
[quote=RickF]I don't know what subwoofer you're talking about being built-in, but you made me think of the Thigpen Rotary Woofer, which "must be professionally installed in an attic or basement which becomes an infinite baffle."


Typical cost after installing one of these is between $20,000 and $25,000 !
_________________________
-David

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#192707 - 01/17/08 11:55 AM Re: Where to place additional subs? [Re: terzaghi]
CV Offline
Founder, Axiom Upgrade Club
shareholder in the making

Registered: 07/20/06
Posts: 11271
Loc: Richland, WA, USA
Are you excited because that's pocket change or your retirement?

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#192718 - 01/17/08 12:29 PM Re: Where to place additional subs? [Re: CV]
RickF Offline
axiomite

Registered: 02/26/05
Posts: 5210
Loc: Vero Beach, Florida
Thanks to my good friend Rick (Wid) for finding the pictures for me, here is the room with the hanging 80s and the *infinite baffle* sub I was referring to ... Rick also had to tell me the subs name because I forgot.

Here's the photos...

Hanging 80s, Infinite Baffle Sub ... Anybody remember his screen name?

'I get by with a little help from my friends' ;\)
_________________________
Rick
Our Room

smile

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#192719 - 01/17/08 12:31 PM Re: Where to place additional subs? [Re: RickF]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6722
Loc: The Peoples Republic of Il.

I belive it was Mikey
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#192721 - 01/17/08 12:35 PM Re: Where to place additional subs? [Re: Wid]
RickF Offline
axiomite

Registered: 02/26/05
Posts: 5210
Loc: Vero Beach, Florida
Oh, what did I do ... forget to ask you *that* question? \:D
_________________________
Rick
Our Room

smile

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