Closed Cell Vs. Open Cell Foam-Which For Damping Loudspeakers?

[marcelnl]

then what would the T-S parameters of your speaker chassis look like?

It sounds to me as you if are using a more or less typical B-R chassis in a TL like enclosure, and try to smother anything from the lower midrange coming due to improper parameters?

Why not use (my favourite), a passive radiator to have the acoustic coupled mass as the speaker probably likes without having the oompha pipe character.

A TL with only the sides dampened will never be able to sound clean as the frequencies you hope to quench are typically difficult to dampen with foam (if not impossible as that would apply for the 200 400 and 700 Hz range anyway )

Your last question could be answered by plug the whole lot with something solid if you hope to attanuate these frequencies to serious levels and see whether the closed volume has benefits ;-)


High freq are easy to dampen, the lower you get the more difficult it is...

my two cents, haven't ventured into TL lately but I am not aware that acoustics has advanced THAT far beyond my 4th edition of the loudspeaker coockbook ;-)