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.
1 - Electrolytic capacitors are among the most important in an audio equipment and replacing them with high-quality capacitors from the factory will improve the sound quality
2 - Electrolytic capacitors have life of work 1000-2000h then begin to lose their qualities
3 - The use of Audio-Grade Capacitor Nichicon / Elna which are made specifically for audio equipment from high-end will make your machine in good times higher
What is audio grade capacitor?
This is capacitors specifically for audio applications. These are designed to give premium sound quality when compared to general purpose capacitors. Nichicon's MUSE series and Elna SILMIC II, ideally suited for first class audio equipment where qualitative and quantitative characteristics are required.
What you should know when you make replacement
1 Mark all cables when separate circuit boards to avoid confusion in the assembly
2 All capacitors meet on parameters of old, replace them one by one so as not to get confused!