Century Stereo! I used to go there all the time in the late 60’s-early 70’s. The Audible Difference in Palo Alto too, where in 1971 I heard the Infinity Servo-tatics driven by SAE electronics (Audio Research hadn’t made it to the West Coast quite yet). The most important High End shop in the South Bay was Garland Audio (John opened the shop in ’74) in San Jose, who had a pair of Wilson WAMM’s driven by the original Levinson amps. I bought a pair of Fulton J speakers from him.
David Fletcher, before he designed The Arm for Sumiko and the Sota turntable, had a retail store in Berkeley, and sold Dayton Wright Electrostatic Loudspeakers. Walt Davies, now the maker of Last record care products, had a store in Livermore, Audio Arts. I bought my ARC/Tympani system in '72 from Walt, a great guy.