Don't know what happened to mine, but I went through some downsizing, from Klipsch to AR powered partners aover a couple year period in the late 80s. The did sound good, I was using mine in the end with a "small" subwoofer, not really a sunwoofer but a kind of bass box. Think I used a nice valve pre-amp into them as well.
cheers
Intel NUC/Chevron Audio NDF16 dac/Amptastic Mini-1/Audium Comp 5
Mains Block: Custom-HiFi-Cables PowerBlack Distribution Block (with super conditioner).
Connected with Reference Fidelity Components Super Neptunes and Speaker Cables.
Powered by Custom-HiFi-Cables DC2 psus