Don’t know if they’ll be easier to contact, but- one of these guys may have some info, regarding that special, center channel crossover: http://www.klipschupgrades.com/belleupgrades3.shtml or: https://critesspeakers.com/crossovers.html A couple papers by Paul Klipsch, on center channel derivation: https://www.rfcafe.com/references/electronics-world/wide-stage-stereo-electronics-world-march-1960.htm and: http://assets.klipsch.com/files/Dope_611120_v2n13.pdf Note that Klipsch had built a Stereo 2-3 Control Box (connected via output transformer taps), to derive the third/center channel. It's just conceivable, that's what you have.
Klipsch Service, is like calling the Federal Government.....What a joke
Paul would roll over in his grave if he ever called Klipsch Comany on the phone......They really don't need one, because they wouldn't answer it anyway.....I have been trying to talk to someone at Klipsch for two months.....No good, the answering system doesn't work, the e-mails never get answered, the questions never get answered......Is there anybody working in the office....."NO".....I own Klipsch Horns, LaScala's, Cornwalls, and would probably own more if I could just get some questions answered from Klipsch............But first you have to wake somebody up there so they will answer the phone.............W