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Reviving a Hi-Fi Classic: the Harman/Kardon A-401 Stereophonic Control Amplifier | Nuts & Volts Magazine
Vintage amplifiers that could challenge or approach current state of the art amplifiers | Page 30 | Audio Science Review (ASR) Forum
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Vintage Harman Kardon AX20 / HK20 // Tube Amplifier Monoblocks – AURAL HiFi
Vintage Harman Kardon AX20 / HK20 // Tube Amplifier Monoblocks – AURAL HiFi
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Harman Kardon HK 6800 Amplifier - Vintage Audio
Reviving a Hi-Fi Classic: the Harman/Kardon A-401 Stereophonic Control Amplifier | Nuts & Volts Magazine
Vintage legend: HARMAN/KARDON 330B (1974) – Silverface Audio
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Harman Kardon PM650 | Hi-Fi News
Vintage Harman Kardon Trio A224 Tube amplifier | eBay
Vintage Harman Kardon AX20 / HK20 // Tube Amplifier Monoblocks – AURAL HiFi
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