Harman Kardon AP 2500 preamplifier, audiophile command control with gold plated contacts from the elite class. - Catawiki
Harman Kardon Citation I Tube Stereo Preamp Control Center 1960's | Reverb
Harman Kardon Citation Twenty-One pre amp — Gig Harbor Audio
Harman Kardon CITATION ELEVEN 11 2-CH Ster... For Sale | Audiogon
Harman Kardon Citation Eleven - Extraordinary! – Holt Hill Audio
Just bought a 1962 Harman/Kardon Galaxy Tube Mixer-Preamp. Does anyone know anything about it? The plan is to restore it and record a DJ mix on it. : r/rotarymixers
Harman Kardon Citation A Solid State Preamplifier Preamp | Reverb
HARMAN KARDON HK 825 Hiend preamp, Audio, Soundbars, Speakers & Amplifiers on Carousell