Missing harman/kardon serial number: hot gear, old glue, or diligent previous owner? : r/BudgetAudiophile
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Nice Harman Kardon PM 665 100 w/ch Twin Power integrated amp — Polk Audio Forum
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Owner Manual - AVR 158 (English EU) - Harman Kardon
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Harman Kardon 930 | Classic Receivers
Reviving a Hi-Fi Classic: the Harman/Kardon A-401 Stereophonic Control Amplifier | Nuts & Volts Magazine
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Harman/Kardon PM-655 | Integrated Amplifiers | Amplifiers | Audio Devices | Spring Air
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Harman Kardon HK6900 Stereo Amplifier Review price specs - Hi-Fi Classic
