Harman Kardon HK6100

The Harman Kardon HK6100 is a stereo integrated amplifier, and almost nothing past its basic specs has survived in the accessible record. No production years, no original price, no circuit details, no period reviews. It appears to be documented mainly through a single Japanese audio database entry. That entry lists 100W per channel into 8 ohms, a frequency response of 5Hz to 100kHz (+0dB/-3dB) and total harmonic distortion of 0.02% at rated output. The signal-to-noise ratio is listed at 90dB (IHF A network).

Input sensitivity is given as 2.5mV for both phono MC and phono MM, and 150mV for line-level sources. The HK6100 measures 440mm × 162mm × 375mm and weighs 15.0kg. That is a big, full-width component, consistent with Harman Kardon's high-current amplifier philosophy of the era, though no design specifics are documented to confirm it. HiFI-Stereo (1991, p.51) covered integrated amplifiers in this class, including a 120 W/ch model with tone defeat, subsonic filter, and two-speaker-pair switching. The HK6100 itself does not appear in those pages.

So the record gives a capable specification sheet and little else. The HK6100 stays a known but shadowy entry in the Harman Kardon catalog.