I was asked to make some external Xovers for another's expensive big speakers. Initially it was to be an electronic Xover which I have built before but we ended up with passives. Inductors were copper foil and "C" core. Neither of these I have used before but were easy to work with. The caps were simple 100V NPs Xover caps and the Xover was symmetrical.
Hookup wire was double pairs of solid core Cat5. Boxes were plastic and jammed with Dacron. this provides a non-magnetic resonance suppressed enclosure. Binding posts were solid brass gold plated three-ways. The mids and woofers were different impedances but that just meant careful selection of parts. Limiting resistors matched driver sensitivity. The tweeters feed of the mid-range and are internal.
Word from the owner is they sound about right with no fine tuning required. I had to make some guesses how to voice the Xovers to give balance across frequencies. Looks like I made some good guesses.
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