[richlo]

I see Real traps and GIK panels size of 2' x 4' (maybe a little bigger), RT have some that are 2' x 2'..my issue is why do they have to be so big across the horizontal, why dont we see some kinda like Eight Nerve (not necessarily the same product)..where they may be 1' by 4'..a 2 x 4 look better when mounting on a wall but straddled to the corner it just doesnt look - well - right. Is there some acoustical reason that it should be 2 x 4 and not maybe 1 x 4. Also I am surprised about the color selections between both, considering that where in age where warm colors tend to dominate right now, why not make something different - brown, burgundy, beige. Most of the colors seem a bit too neutral or cool.

[Marbles]

One possible reason for the 2' x 4' sizes is that they (at least it looks like GIK's) are made from ceiling tile that come standard in these sizes.  It seems that it is difficult to get a very clean cut to make them into different sizes.  Also, I've been told obsorption requires square footage of coverage, so in the case of bass obsorbers, bigger really is better.

As to colors, I have no idea.  I will say that the off white color that GIK uses matches my wall color perfectly.

If you have a color you want, and you can find the right material at a local store, you might want to give RT, GIK, or 8th N, a call and see if you can send it to them to use in making your products.  At the same time, you should talk to them about the size you want, so they can build your products to your exact needs.

[bpape]

To provide real deep bass absorbtion, there are 3 things that will affect it.

- thickness
- density
- distance from the leading edge to the boundary

A 1'x4' absorber straddling the corner, all else being equal, will not reach as low as a 2'x2'.  While you have the same surface area, you have less distance from the boundary to the leading edge. Part of controlling bass with a broadband absorber is to get closer to the 1/4 wavelength point from the boundary.

The Real Traps are a membrane based system that works a bit differently than the softer more broadband absorbtion provided by the GIK panels.  Both have their place - depends on what you need.

The sizes are determined by what has been found to be most effective in controlling deep bass.    If you want something more 'attractive' and smaller, you can certainly build something yourself in the way of a tuned membrane absorber of a smaller size.

[PhilNYC]

Regarding colors, a lot of acoustic treatment companies source their fabrics from Guilfords of Maine (http://www.guilfordofmaine.com/.  They claim to be "acoustically transparent".  According to their FAQ, there is no minimum order for purchasing from them.

I work with an acoustic treatment company called AcousticsFirst, and here is the color selection they work with from Guilfords of Maine:

http://www.acousticsfirst.com/guilfrd1.htm

[richlo]

I think maybe Id be more interested in a cylindrical bass trap...I am not into DIY - any ideas where to purchase these..

[PhilNYC]

I haven't seen full cylinders, but AcousticsFirst makes "half-rounds":

http://www.acousticsfirst.com/geomet.htm

Pricing for all their stuff is here:

http://www.acousticsfirst.com/docs/afc_Price_06-web.pdf

[Glenn K]

I see Real traps and GIK panels size of 2' x 4' (maybe a little bigger), RT have some that are 2' x 2'..my issue is why do they have to be so big across the horizontal, why dont we see some kinda like Eight Nerve (not necessarily the same product)..where they may be 1' by 4'..a 2 x 4 look better when mounting on a wall but straddled to the corner it just doesnt look - well - right. Is there some acoustical reason that it should be 2 x 4 and not maybe 1 x 4. Also I am surprised about the color selections bet ...

Bryan explained the size to you..

The reason for the color is because of stocking it and being able to offer it at a affordable price. But with all that said, look for us to be offering about 11 different colors real soon.. Mind you that there will be a up charge for them, but if someone needs a different color then we can do it..

Glenn

[ctviggen]

Full rounds:

http://www.acousticsciences.com/tubetrap.htm

I don't think the above are helmholtz resonators.  

8th Nerve is supposed to be coming out with one, too.

[richlo]

Glenn

TOO LATE ..I bought them from you  

[Glenn K]

Glenn

TOO LATE ..I bought them from you  

Well thank you sir!