your first system-

cgtomash,

Why didn't you get another system since way back then?

My memory from the early 1970's is a little hazy, but I believe at one time my system consisted of a Sansui AU 9500 integrated, Thorens TD160 with Grace 707 and Supex SD900 Super. Speakers were a woodworking project with my father. JBL 15" woofer with 15" passive radiator, along with a JBL horn midrange and tweeter. 

My room was 10' x 10'.

who has replaced the seats, the engine, the chassis ....

I have an old hammer that is so old it has had 3 new handles and two new heads!

A light green General Electric 300 portable turntable with speakers. My parents bought it, so I had no choice. A piece of crap, for sure.

Technics belt drive, Rotel amp with LED meters, AIWA 3 head cassette, KEF Coda 3 speakers. Literally on a bookshelf. 1979 maybe.