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Harman/Kardon 930 Twin Powered from 1972 | unfortunately a knob is missing and some lights still need repair but overall it is in very good condition : r/vintageaudio
Problem with my Harman Kardon 930 receiver | diyAudio
Harman Kardon 930/630/330C ON/OFF Switch. Tested. Parting Out HK 930/630 | eBay
Harman Kardon HK930 For Sale
HK930 - Alerts! - The Klipsch Audio Community
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Harman Kardon HK 930 - YouTube
Classic Harman Kardon 930 receiver. MINT — Polk Audio Forum