Hi Uncle Bob.. I don't know much about this stuff, but I got some Harman/Kardon 2 speaker/sub setup some 10 years ago and it's just the single headphone output plug, but it does have a 120v plugin to.. It's like you typical 2 speaker setup, but it does have the sub on it and that thing BOOMS..
No 5.1 for sure, but you listen to any vid or play an iPod thru it and it will rattle the desk!
I don't have anymore info on it, as I don't even know when I got it, but it's **** old...
I don't even recall seeing PC audio outputs with the RCA out's.. I had an old 5.1 DVD player that did that.. But, even my BluRay 5.1 HDMI setup really does not have the bass that old H/K does to be honest...
Good luck! Mitch
