This weekend i installed a active filter,and one more amp,,,the filter can make delay,,peq,,notch,,,shelf,,and filter in many way
i use now 24db 850hz on bass and tweeter,,,some room correction and a little delay on the bass,,peq on the tweeter around 13khz,,the measure, in my listening position, is not so bad
super bass sound, direct couplet on the amp ,,more tight, better definition
overall a more dynamic presentation
the filter and amp is from a danish company called Groundsound
The Groundsound amp is on the bass,,,and my Gryphon is on the tweeter
Bjarne