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danny.guitar

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I'm making some 2'x4' 4" thick broadband absorbers that I will use when recording acoustic guitar. My room sounds like shit and I can't afford to treat the whole thing right now.

I will be placing them on guitar stands and using about 3 of them to help isolate the acoustic guitar from the rest of the room when recording. I attached a picture of what I'm talking about.

My question is, which guitar stand should I use? Would this one be good enough to support the weight? (I have no idea how much the average 2x4 trap weighs).
 

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I just built bases for mine. Made a slot just wide enough in a 2 by 8 that my frame slides right in and stays there. Lay the 2 by 8 on the ground, and slide in a gobo. Works great.
 
Thanks for the quick replies. :cool:

Tragik - Thanks for the suggestion, I'll probably go with one of those. Looks like it will provide better support.

notbradsohner - I have absolutely no experience in building things so this is a first for me. I was thinking of building my own stand but I'm trying to keep this as simple/cheap as possible at first.

:cool:
 
Here's another stupid question: I should get some 2'x4'x4" wood for the frame, right? Because I want them to absorb some of the lower frequencies too, so they have to be 4" thick?
 
danny.guitar said:
Here's another stupid question: I should get some 2'x4'x4" wood for the frame, right? Because I want them to absorb some of the lower frequencies too, so they have to be 4" thick?
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You could space the fiberglass out from the back, making it more effective for bass. Leave a 1" gap.
 
heres some food for thought;

a 2x4 is actually about 1 5/8"x3" :)

that will screw you up even more now ;)
 
Use 1x4's for your framing. 2x4's is overkill.

A 1x4 is actually 3/4" x 3 1/2".

4" of rigid fiberglass will extend out either in front or in back (take your pick) 1/2" beyond the width of a 1x4.

How do you propose mounting them on the mic stands?
 
The A-frame stands should work for lighter panels, although, as suggested above, you could just attach extra pieces of wood to make "feet." I have some panels that I did that to, then put wheels/casters on the bottom so I could roll them around.

The weight of your panels will be related to the thickness & density of insulation you use. My 2'x4'x4" panels, made with 8pcf mineral wool, weigh about 22 lbs each.

Here's a pic of the casters on mine:
 

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Yea, I guess I could just get a couple flat boards and attach them to the frame and use them as feet.

The picture that gave me this idea to begin with is from a thread Timothy Lawler made.

attachment.php


I basically wanted to do what he did except instead of just auralex for high frequencies, I wanted to use broadband absorption panels.

Thanks for the idea though scrubs, that's probably what I'll do. Cheaper than using mic/guitar stands.

One question about that: Is there a certain way to attach the frame to the feet? Do you think just using screws would allow the frame to tip back and forth? Should I use a combination of wood glue and screws?
 
danny.guitar said:
hanks for the idea though scrubs, that's probably what I'll do. Cheaper than using mic/guitar stands.

One question about that: Is there a certain way to attach the frame to the feet? Do you think just using screws would allow the frame to tip back and forth? Should I use a combination of wood glue and screws?
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I just used nails, but screws would be more secure. You could also get some little "L" shaped corner braces and screw those on. The main factor that will prevent tipping is the length of the feet.
 
scrubs said:
I just used nails, but screws would be more secure. You could also get some little "L" shaped corner braces and screw those on. The main factor that will prevent tipping is the length of the feet.
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Ok, thanks. :cool:
 
Ok I'm going to Lowes tomorrow to pick up some wood, screws, etc.

Now I need some insulation. Before calling around for 703, do you think this will work good enough for what I'm doing?

http://www.acousticalsurfaces.com/wall_insulation/ultratouch.htm?d=28

And about how much should I get/how thick do I need to make the panels using this stuff?

I don't like the idea of having fiberglass fibers getting loose in my room if I fuck this up somehow, or don't cover it as well as I should, or whatever.
 
Most likely not, but I have no idea without seeing the absorbtion coefficients. You want something more dense. Where are you located, I will see if I can track down some 703. The fibers are nothing to worry about as long as you cover it. They will not get through the fabric, just make sure you fold it over the edges.
 
notbradsohner said:
Most likely not, but I have no idea without seeing the absorbtion coefficients. You want something more dense. Where are you located, I will see if I can track down some 703. The fibers are nothing to worry about as long as you cover it. They will not get through the fabric, just make sure you fold it over the edges.
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I'm in Huntsville, AL.

I would really appreciate you trying to track some down for me.

I'm also going to look in the phone book tomorrow and call around but I get the feeling I won't have much luck.
 
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