Computer-Aided Design of Loudspeaker Crossover Networks

[Sal1950]

Tubes in an active crossover, I personally wouldn't unless you enjoy playing 'find the faulty tube'.
Keith

Think of all the "tube rolling" fun. It will give the tweakers endless hours of amusement and magic dust revelations to post about!

 

[Sal1950]

Put some front oriented bread sized ports on them so they double up as toasters with the salt content of processed white bread the toasted bread crumbs left inside the speakers will act as peizoelectric filters.

Looks like Keith's PSI speakers have beat us too it

I thought that was a CD slot for Direct From Disc playback.