Hitachi is a Japanese multinational conglomerate company with a diverse range of products and services. It was founded in 1910 and is headquartered in Tokyo, Japan. The company operates in various sectors including electronics, construction machinery, power systems, automotive systems, and more.

Hitachi

The Hitachi HD-66 is a model of headphones that was manufactured by Hitachi between 1973 and 1975 in Japan. It was offered at an approximate original price of 68 DM. Although specific technical specifications are not extensively documented, the HD-66 is part of a series that includes various audio equipment, such as amplifiers, tuners, receivers, and tape decks, highlighting its place within a broader audio ecosystem from Hitachi during that era. Other headphones in the same series include models HD-33 and HD-55.

HD-66

by Hitachi

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