It was My buddy's system:
Hitachi receiver
Unknown turntable
Pioneer Cassette Deck with fluoroscan meters
Realistic Mach One speakers
...followed within a few years (early '80s) with my own:
Luxman L450 Integrated
Luxman Graphic EQ
Nakamichi LX-5 3-head cassette deck
Pioneer PL-200 (?) direct drive turntable with Pickering XV-15 cartridge
Realistic Mach One speakers.
...oh yeah, there was also that first time I heard Rush in my other buddy's car on a Craig stereo of some sort--Cygnus X-1 and............I was hooked.