Harman Kardon 930 (1972–1976)

A top-of-the-line solid-state stereo receiver with a dual power supply for better channel separation and performance.

Overview

The Harman Kardon 930 is a solid-state AM/FM/Stereo FM receiver. It was made from 1972 to 1976. Harman Kardon sold it as a high-end model. The "Twin Power" design gives each channel its own independent regulated power supply. It has high-quality MM phono inputs, and it was noted for its sturdy build and audiophile-grade sound. The look is classic: a blackout dial face, green dial lighting and a brushed aluminum front panel.

Specifications

Product type	AM/FM/Stereo FM Solid State Receiver
Power output	45 or 48 watts per channel into 8Ω (stereo)
Frequency response	below 4Hz to above 70kHz +/-
Dimensions	432 x 121 x 350 mm or 15.3" x 4.5" x 13" (possible typo in other source: 17in W by 1334in D by 44in H)
Weight	13.2 kg (21 lbs)
Tuning range	FM, MW

Design

The 930 uses a dual power supply system, with separate transformers and regulator circuits for each channel. This improves dynamic range and reduces crosstalk. Each channel gets its own regulated voltages to support full RMS output. The dial face is blacked out with green lighting, and the finish is brushed aluminum. The MM phono inputs are high quality, and they benefit from the isolated power design.

Context

Harman Kardon positioned the 930 as a top-of-the-line receiver in the early 1970s. It was one of the brand's most advanced designs of the era. The "Twin Power" architecture put it at the front of stereo receiver design, with performance aimed at discerning audiophiles.