Vintage Harmon Kardon HK-40 Speakers - electronics - by owner - sale - craigslist
1970s Era Harmon-Kardon 330B with Matching Omni Directional Speakers For Sale at 1stDibs | 1970s stereo system for sale, harman kardon 330b, harmon kardon 330b
VINTAGE Pair of Harman/Kardon Model 2 Speakers EXC- 2-way ported RARE | eBay
Harman Kardon HK40 Vintage Home Audio Speakers - Excellent! Photo #1305615 - Canuck Audio Mart