In the early 1950s, Sidney Harman was the general manager of the David Bogen Company, a manufacturer of public address systems at the time. Bernard Kardon was the chief engineer at Bogen. Due to management changes at Bogen in the early 1950s, both men resigned. With $5,000 investment each, Sidney Harman and Bernard Kardon founded the Harman Kardon Company in 1953.

In the 1950s Harman Kardon designed some of the first high fidelity audio products that lent to starting the high fidelity business. Integrated receivers (with a tuner, preamplifier and power amplifier) was an idea to introduce and provide high fidelity performance in a single unit. Integrated high fidelity receivers, however, were not new — Scott Radio Laboratories had manufactured such items in the late 1930s. The company’s first product was an FM tuner.

One year after its founding, in 1954, Harman Kardon introduced their compact size high fidelity receiver, the Festival D1000. The D1000 was one of the world’s first AM/FM compact Hi-Fi receivers, and a forerunner to today’s integrated receivers. This monaural unit was aimed to introduce non-technical consumers to high fidelity and combined many now-familiar features such as a tuner, component control unit and amplifier in a single chassis. The shape, form function and size of the D1000 was a forerunner of the modern integrated receiver. Early Harman Kardon Hi-Fi equipment can be identified by a distinctive design of a copper plated chassis with a copper and black color scheme for panels and enclosures.

Brand: Harman Kardon

Harman Kardon 100 Plus

Harman Kardon 100 Plus Specifications Tuning range: FM, MW Power output: 57.5W/ch (stereo), 24W/ch into 8Ω (quadraphonic) Frequency respon..

Harman Kardon 800 Plus

Harman Kardon 800 Plus Specifications Tuning range: FM, MW Power output: 50W/ch (stereo), 22W/ch into 8Ω (quadraphonic) Frequency response..

Harman Kardon 150 Plus

Harman Kardon 150 Plus Specifications Tuning range: FM, MW Power output: 70W/ch (stereo), 30W/ch into 8Ω (quadraphonic) Frequency response..

Harman Kardon 50 Plus

Harman Kardon 50 Plus Specifications Tuning range: FM, MW Power output: 25W/ch (stereo), 12.5W/ch into 8Ω (quadraphonic) Frequency respons..

Harman Kardon HK505

Harman Kardon HK505 Specifications Dimensions: 425 x 134 x 352mm Weight: 12kg Year: 1979

Harman Kardon HK503

Harman Kardon HK503 Specifications Power output: 40 watts per channel into 8Ω (stereo) Dimensions: 425 x 134 x 260mm Weight: 9.4kg Year: 1..