Chu Gai wrote:

snip From an acoustical
standpoint MDF is dampening. It absorbs sound due to it's mass and
weight.

I am trying to allow the energy that would be absorbed by MDF to be
better utilized re-creating acoustical energy in the room. Of course
you do not want your speakerbox to vibrate, but using a "dead" panel
is the easy way out and not neccesarily the best method. ANd I think
Franco Serbelin agrees.

These statements by "Him" seem silly. Ideally, the speaker cabinet
should add nothing to the sound coming from the speaker cones. "Him"
seems to be claiming that MD fiberboard absorbs so much of the speaker
output that the efficiency of the speaker system is compromised. That
sounds like BS to me.