Multiple subs vs. Room treatments

djn · 5th November 2012, 10:10 PM

Hi All, finally settled in the new house and working with a smaller room but still good size. I have two very good subs and all the bits to build two more. I know I have a standing wave at around 250hz so I plan on making good panels with OC703. Most likely 12 of them 2' x 4' x 3".

So I have this thought that I want to explore. I want to go with multiple subs to smooth out the nulls and peaks, BUT.....won't panels do that by absorbing the sound waves???

I can't seem to think this one through.

sreten · 5th November 2012, 10:20 PM

Quote:

Originally Posted by djn

I can't seem to think this one through.

Hi,

True, 250Hz is a very unlikely single problem.

rgds, sreten.

weltersys · 5th November 2012, 10:42 PM

Quote:

Originally Posted by djn

I know I have a standing wave at around 250hz so I plan on making good panels with OC703. Most likely 12 of them 2' x 4' x 3".

So I have this thought that I want to explore. I want to go with multiple subs to smooth out the nulls and peaks, BUT.....won't panels do that by absorbing the sound waves???

The one inch 703 panels won't do much below 500 Hz, the 2 inch absorbs some more down to 250 Hz, leaving a dead high end and little LF absorption, which may sound "dead/boingy".

At any rate, the panels will do little in the "sub" 125 Hz range, so don't let them stop you from adding multiple subs.

Art

tvrgeek · 5th November 2012, 10:58 PM

Yea, the answer is "yes"

The only bass absorber I have that worked was a stack of FG roles in the corner. Very low WAF. Looking into panel traps instead.

djn · 5th November 2012, 11:16 PM

The OC703 I will use is 3" thick

weltersys · 5th November 2012, 11:34 PM

Quote:

Originally Posted by djn

The OC703 I will use is 3" thick

How does the 3" compare with the 2" in sound absorption below 250 Hz?

djn · 5th November 2012, 11:46 PM

Don't know. Using phone so not much data

maxo · 6th November 2012, 12:21 AM

Take a look at this

GIK Acoustics: Room Setup
DIY Bass Traps - kits & Acoustic Panels: Ready Acoustics
Build a Better Bass Trap
Primacoustic Acoustic Solutions
Steven P. Helm: DIY Bass Traps
DIY Tube Traps
Do You DIY? | Acoustimac.com | Acoustic Panels | Acoustic Insulation | Soundproofing

http://www.google.com/url?sa=t&rct=j...qv448Q&cad=rja

tb46 · 6th November 2012, 01:03 AM

Hi,

Don't get the room to "dead".

Another reference: http://www.bobgolds.com/AbsorptionCoefficients.htm

I'm attaching the data on OC70x panels.

Regards,

auplater · 6th November 2012, 01:11 AM

I've had much better success with multiple subs than absorbers... easier on the eyes as well.

Placement is the key.

John L.

5th November 2012, 10:10 PM	#1
djn diyAudio Member Join Date: Oct 2004 Location: Waterford Michigan	Multiple subs vs. Room treatments Hi All, finally settled in the new house and working with a smaller room but still good size. I have two very good subs and all the bits to build two more. I know I have a standing wave at around 250hz so I plan on making good panels with OC703. Most likely 12 of them 2' x 4' x 3". So I have this thought that I want to explore. I want to go with multiple subs to smooth out the nulls and peaks, BUT.....won't panels do that by absorbing the sound waves??? I can't seem to think this one through. __________________ My "Art" website http://home.comcast.net/~djnagle/site/

5th November 2012, 11:16 PM	#5
djn diyAudio Member Join Date: Oct 2004 Location: Waterford Michigan	The OC703 I will use is 3" thick __________________ My "Art" website http://home.comcast.net/~djnagle/site/

5th November 2012, 11:46 PM	#7
djn diyAudio Member Join Date: Oct 2004 Location: Waterford Michigan	Don't know. Using phone so not much data __________________ My "Art" website http://home.comcast.net/~djnagle/site/

6th November 2012, 01:11 AM	#10
auplater diyAudio Member Join Date: Apr 2005 Location: KyOhWVa tristate	I've had much better success with multiple subs than absorbers... easier on the eyes as well. Placement is the key. John L. __________________ "...His brain is squirming like a toad..." Jim Morrison

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5th November 2012, 10:58 PM	#4
tvrgeek diyAudio Member Join Date: Dec 2009 Location: Md	Yea, the answer is "yes" The only bass absorber I have that worked was a stack of FG roles in the corner. Very low WAF. Looking into panel traps instead.

6th November 2012, 12:21 AM	#8
maxo diyAudio Member Join Date: Sep 2012 Location: A Hole in Texas	Take a look at this GIK Acoustics: Room Setup DIY Bass Traps - kits & Acoustic Panels: Ready Acoustics Build a Better Bass Trap Primacoustic Acoustic Solutions Steven P. Helm: DIY Bass Traps DIY Tube Traps Do You DIY? \| Acoustimac.com \| Acoustic Panels \| Acoustic Insulation \| Soundproofing http://www.google.com/url?sa=t&rct=j...qv448Q&cad=rja

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