Normal
Re: FIR filtersThese links may be of interest ... http://www.bowers-wilkins.net/Discover/Discover/Technologies/FST.html http://www.bowers-wilkins.net/Discover/Discover/Technologies/Kevlar.htmlOnce you get beyond the piston range its still a bit of a black art balancing cone materials, profiles and suspension types
Re: FIR filters
These links may be of interest ... http://www.bowers-wilkins.net/Discover/Discover/Technologies/FST.html http://www.bowers-wilkins.net/Discover/Discover/Technologies/Kevlar.html
Once you get beyond the piston range its still a bit of a black art balancing cone materials, profiles and suspension types