Musicraft at 95th and Western in Evergreen Park, IL was the closest to those of us in the south 'burbs in the early '70s. Musicraft was a small Chicago area chain with a mid-fi emphasis, even though they were a McIntosh dealer.
Soon thereafter, Audio Enterprises in Chicago Heights opened my eyes to the boutique "high end" market: Marantz, B&W, ADS, B&O, McIntosh, Crown, Sumiko, Micro-Seki, Tandberg, Bedini, Koss Electrostatics, Quad, Revox, Phase Linear, Thorens, Grado, Luxman, Dahlquist, Sony's "top shelf line" among others.