I have a H/K 330c (bout 15 wpc) that I am using with a Yamaha CDP, and a pair of Realistic Shack Minimus 7W speakers.
I would put this system up against any of the fancy, all-in-one, >$200 mini systems that you see at your local CC or BB in a heartbeat!
A not well known fact is that Harman Kardon and Onkyo were considered a "cut above" similar Kenwood, Pioneer, and Sansui units produced doing that vintage, with excellent build quality and their prices reflected it. (I know....I know..... I'm asking for it...Let the flaming begin)