The strength component is fairly important as well, unless the box is made of depleted uranium, there will be some movement that will result in an acoustic loss, AFAIK.
Even things we consider to be rigid oscillate when motivated by force. I'd like to see what the first panel in front of a tapped horn driver (S1) looks like on a high speed camera while playing a full power 20 cycle note.
Even things we consider to be rigid oscillate when motivated by force. I'd like to see what the first panel in front of a tapped horn driver (S1) looks like on a high speed camera while playing a full power 20 cycle note.