Harman Kardon 430

Documentation on the Harman Kardon 430 is thin. What survives comes mostly from the company's own advertising in the mid-to-late 1970s, where it was promoted as a "ultrawideband" receiver alongside the 730 model.

The 430 used Harman Kardon's "Twin Power" amplifier design - separate power supplies for each channel. The company argued this preserved channel-to-channel performance during demanding musical passages. Harman Kardon claimed a frequency response of 4-140,000 Hz, well beyond the 20-20,000 Hz typical of many contemporaries, and marketed the 430 on its wideband transient response and square-wave reproduction. Audio (January 1978, p.11) carried Harman Kardon's assertion that the design "gives you a sound that stays open and accurate, clear on down to the bottom."

Beyond these advertising claims, little else is recorded. No independent test reports, original pricing, or production years have surfaced in the available sources.