two channel consists of soundcraftsmen SP4002 preamp EQ ,DBX 3b expander Crown powerline 4 series amp & Two Belle klipsch with AA crossovers not sure ofthe year of Belles they sound so good it didnt matter ,I switch out amps at times with crown300A series amp, And Forte model 3 amp, The forte amp gives them a really nice sound, I listen to the Forte amp a lot , and hours of listening with Khorns & phaselinear 700 series 2 amp, had Circle stereo in Dripping Springs Texas go through amp for any issues, and John soderberg for the Forte Amp to get it to original specs,In the early 80,s this was used in family resturant with 4 La scalas and K horns on the dance floor, Just think if I would have Known about that Kpt 684SW, Maybe one day my two brother & I known in DJ circles in town AS The Cleanest Sound In Town , They both have 4 LSI each , & 4Hersey HIP, &little Sister with A pair of Lascalas,And big Sister With Zebrawood cornwalls,Other big Brother with 1980 unfinished K horns & Fortes& Chours I started this I should have suggested last name Change to Klipsch, At that time they probably would have at our next family Reunion Iam Going to put it up to Vote,LOL, The Family Of Klipsch.Up date nephew just bought set of 1980
Cornwalls.