there is absolutely no info on this at all online except one quick byte on a mclintosh site. im wondering when it was produced and for how long. that site said early 70;s but it looks 60's. the serial number is low at 1433 im thinking they didn't make that many or for that long. didn't this come with an available speaker set? were they called university concept eq 5 speakers? im also wondering what it's worth but that part doesnt matter considering ill be keeping it. how rare is this thing? pic is coming soon. thanks