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Harman Kardon HK 620 Integrated Amplifiers user reviews : 4.6 out of 5 - 11 reviews - audioreview.com
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SOLD: FS: Vintage Harman Kardon HK 620 stereo amplifier - Stereo, Home Cinema, Headphones Components - StereoNET International
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THE HARMAN KARDON HK620 Service Manual download, schematics, eeprom, repair info for electronics experts
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