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Old 11th July 2008, 10:59 PM   #11
TerryO is offline TerryO  United States
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Quote:
Originally posted by MJL21193



I came to this conclusion recently also. Effective bracing splits the surface area of the panels, thereby driving up the amount of energy required to make them resonate. The point is reached where there isn't enough energy to excite the resonance.
Planet10 has been preaching this and I finally caught on.

Yep!
When splitting up the panels you should have your main braces connect several sides, preferably all the panels of the cabinet. Then divide those remaining panels into smaller areas with smaller dimensional braces, say nominal 1X2's into triangular spaces of random sizes. Opposing sides should have different random patterns, as this avoids any harmonic gain or combining at the resonant frequency of the panel. These braces must go from an edge of a panel or a brace, to the same, for effective damping. Actually, this causes the small areas between the bracing to resonate at a much higher frequency, which is more easily damped by the panel itself. Constrained layer constuction, with additional glops, goops or other magic substances can be also used and, in fact, just gluing pieces of leftover or scrap vinyl flooring in between the braces can contribute to peace of mind.

There are so many ways to skin a cat!

Best Regards,
TerryO
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Old 12th July 2008, 12:54 AM   #12
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Quote:
Originally posted by pjpoes
You will find that tons of bracing, and I can give you some ideas of what I am finding works best, will do the most to deaden the box.
My epiphany in this regard occurred the first time I opened a Matrix series from B&W. The trade-off is larger cabinet size for a given internal volume but most of us can live with that.
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