For me it was 70’s -90’s. I call it the Audio Center days. I recall 6 dedicated audio salons on Oahu. 2 "high end". Hanson’s place in Kahala and super underground Alston. Lafayette, Holiday Mart, Shirokiya and tv repair shops had their stereo corners. I don’t know if the military PX still sells stereos. Lots. LOTS of military were into stereo. From high mass market high fi, went crazy. The "Power Wars". Then this guy Mark Levinson shows up with a 25 Watt power amp. I don’t remember $2500 pr. or $2500 per channel. Stax, Magnepan, Audio Research, IRS, HQD, Hill Plasmatronics, Luxman, Wilson Audio, Koetsu, Linn... came on the scene.
However, I recognize and appreciate the advancements of audio today. But not as exciting for me as it was back in the day.