Passive VS Active crossover-What s the difference s


Hi All,
Would you explain the difference between a Passive X-over and an Active X-over? What kind is needed (and IS it?) for Bi-amping? Any recommended models - new or used?
Thanks!
soundsgr8tome

Showing 1 response by frap

Sean, I agree with you on your post regarding dynamic drivers bi, tri, and quad amped.....but we need to mention that the introduction of an active X-over into your ultra hi end setup, could well destroy the purity of the electronics you are using. I have tried the original Levinson LNC-2, the now defunct Symmetry (much better) and ARC. The hi pass sections of these were NOT up to the quality of my preferred electronics and hurt the sound everytime.
Electrostatics like the QUAD ESL-63 also are hurt by the disruption of the crossoverless signal purity. I tried everything to relieve the panels and increase dynamics, but everytime the sound was better without. My ultimate solution was to stack the ESL-63 full range, thus yielding maybe 3db more output, and more surface launch area; then overlap the subs with an electronic X-over Without using the hi pass section.
Stacking of dynamic loudspeakers, though, can mess up the accurate time response of a well designed loudspeaker.
We went through this when we stacked Rogers LS3/5A's to make them "bigger". "No, no, no" was the reaction on that issue. "something isn't quite right anymore"...........Frank