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  2. Zenith Electronics - Wikipedia

    en.wikipedia.org/wiki/Zenith_Electronics

    They were joined in 1921 by Eugene F. McDonald, [4] and Zenith Radio Company was incorporated in 1923. The fledgling company soon became known for its high-quality radios and electronic innovations. Zenith introduced the first portable radio in 1924, [4] [5] the first mass-produced AC radio in 1926, [5] and push-button tuning in 1927. [4]

  3. Trans-Oceanic - Wikipedia

    en.wikipedia.org/wiki/Trans-Oceanic

    The Zenith 'T/O' began life in October 1941 with the production of the Model 7G605 'Trans-ocean Clipper'. Priced at $75, it was introduced in January 1942 but ceased production in April 1942 as Zenith shifted their production to war-related equipment. During this short production run, some 35,000 units were produced and sales data showed that ...

  4. SDI Technologies - Wikipedia

    en.wikipedia.org/wiki/SDI_Technologies

    A Soundesign pocket transistor radio from the 1960s. SDI Technologies was founded as Realtone Electronics in 1956 by Saul Ashkenazi and Ely Ashkenazi. [3] In that year, the company introduced a pocket cigarette lighter and a transistor radio, but neither one of the first.

  5. List of loudspeaker manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_loudspeaker...

    PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy Rectilinear Research Corporation: United States Rega Research: United Kingdom Renkus-Heinz: United States ReVox: Switzerland ...

  6. Zenith Data Systems - Wikipedia

    en.wikipedia.org/wiki/Zenith_Data_Systems

    Zenith Data Systems Corporation (ZDS) was an American computer systems manufacturing company active from 1979 to 1996.It was originally a division of the Zenith Radio Company (later Zenith Electronics), after they had purchased the Heath Company and, by extension, their Heathkit line of electronic kits and kit microcomputers, from Schlumberger in October 1979.

  7. Horn loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Horn_loudspeaker

    A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.

  8. Vintage musical equipment - Wikipedia

    en.wikipedia.org/wiki/Vintage_musical_equipment

    A guitar pedal board comprising several effects pedals, including vintage Electro-Harmonix Big Muff and Vox wah-wah pedals from the 1960s and 70s. Vintage musical equipment is older music gear, including instruments, amplifiers and speakers, sound recording equipment and effects pedals, sought after, maintained and used by record producers, audio engineers and musicians who are interested in ...

  9. All American Five - Wikipedia

    en.wikipedia.org/wiki/All_American_Five

    The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.