Harman Kardon Digital Stereo Receiver Hk581i PARTS or REPAIR - Etsy
1982 Harman-Kardon Ask any Audiophile
HARMAN KARDON HK680I 680I Service Manual *ORIGINAL* BOOK OR PDF-FREE SHIP | eBay
Harmon Kardon hk680i - low volume in right speaker channel : r/vintageaudio
Harman Kardon HK-680i Stereo Receiver Photo #2249267 - US Audio Mart
HK680i and EQ8 ——-Paid $9.99 each! Its usually $4.99 at our local goodwill today, but still i cant complain!! Everything works and sounds awesome. Did not do any cleaning or anything yet.