passive crossovers hookup

with a passive crossover network (built with non-polarized capacitors and coils) they are connected to the speaker terminals, between amp and speakers. They have to be built to the frequency and impedence desired or required.using a low-pass filter on the subs is always a good idea. if no two speakers on any given amp channel are reproducing the same frequencies at the same time, then there is no drop in impedence for the amplifier (example a 4 ohm midrange, and a 4 ohm sub, properly crossed over/filtered, will represent a total combined 4 ohm load to the amp. 2 4 ohm subs in parallel on the amp will produce a 2 ohm load.)if you use an electronic crossover, this goes between the head unit and amps, however this is used when a separate amp is used for each "set" of speakers "say an amp for the subs, an amp for mids/highs or 4 channel amp for fronts/reaars)this way only specific frequencies are sent to each amp.-GlassWolf

Pioneer Stage-4, Orion, DynAudio, Fi