new speaker baffle design concept...good or not?
I was thinking today about wide open baffles and narrow open baffles and the benefits of both (wide=later rolloff, narrow=less baffle reflections) and realized an idea.
I could place quarter wavelength foam on the front and rear of the baffle to eliminate all baffle reflections, but still maintain the low-roll off point of a wide open-baffle.
For a 3-way, It would be constructed like this.
I would build a compound tower, composed of 2 baffles (each 24" x 24"). The base baffle would be angled upwards slightly (5*-10*) and would house a 15" midbass driver crossed below 560hz (~24) as to eliminate all baffle reflections in its passband. The upper baffle would be a 24" wide x 24" tall x 9" deep structure. The baffle would be placed within this structure in the very middle (4.5" deep) and all unnecessary surface area would be cut away, as to minimize reflections and allow the waves to travel from the front sheet of foam to the rear. A sheet of 4" deep foam would be placed inside the structure in front of the baffle, and another 4" sheet of foam would be placed behind the baffle. The frequencies radiating from the front would extend through the front piece of foam to the rear and the rear wave would do just the opposite. The midrange and tweeter would be placed within the very center of this baffle and foam would be trimmed accordingly as to allow 30* of off-axis response. I would then cover the top baffle with grille cloth as to shroud the foam and make it aesthetically pleasing.
Hopefully, through the integration of the foam to the baffle, I can eliminate all baffle reflections.
It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong. - Richard Feynman