I do not think the 5-sided box will work.
The bass wavelengths are simply too long to "see" the box and be contained by it. For instance, at 40 Hz the wavelenghs are 28 feet long. Those wavelengths simply will not be significantly affected by features less than about 7 feet across.
For information on bass traps, you might find this article useful:
http://www.audioholics.com/techtips/setup/acoustics/BassTraps.html
Aside from the bass-smoothing technique I described in another thread, there is another active technique that come to mind.: Use a monopole and a dipole subwoofer, and time-delay the signal to the dipole (by how much, I don't know). The combination of a monopole and time-delayed dipole produces a cardioid (heart-shaped) radiation pattern. The bass system used in the Martin Logan Prodigy and Odyssey was a passive cardioid-pattern type. Meyersound makes active cardioid-pattern prosound subwoofers.
Best of luck to you!
Duke
The bass wavelengths are simply too long to "see" the box and be contained by it. For instance, at 40 Hz the wavelenghs are 28 feet long. Those wavelengths simply will not be significantly affected by features less than about 7 feet across.
For information on bass traps, you might find this article useful:
http://www.audioholics.com/techtips/setup/acoustics/BassTraps.html
Aside from the bass-smoothing technique I described in another thread, there is another active technique that come to mind.: Use a monopole and a dipole subwoofer, and time-delay the signal to the dipole (by how much, I don't know). The combination of a monopole and time-delayed dipole produces a cardioid (heart-shaped) radiation pattern. The bass system used in the Martin Logan Prodigy and Odyssey was a passive cardioid-pattern type. Meyersound makes active cardioid-pattern prosound subwoofers.
Best of luck to you!
Duke