The different appearance of the Tannoy 5-inch coaxial basin frame is due to different production batches
Different from the 5-inch unit used in the common CPA-5 speakers, the basin frame is It is made of engineering plastic, and the magnets are not antimagnetic treated; however, they do use Tannoy's patented ICT full-range structure, with exquisite craftsmanship and good sound quality. There are no dust covers for the central tweeter and voice coil parts.
In 1926, Tulsemere Manufacturing Company was established in London. In March 1932, the company's founder GuyRFountain registered "Tianlang" as a trademark. "Tannoy" is the abbreviation of "tantalum alloy". Fountain developed AC power electrolytic rectifiers made of tantalum and lead alloys, which were widely used to charge early radio batteries. Soon, Tannoy began to manufacture dynamic speakers using DC magnetization, and by the end of the 1930s, it also began to produce microphones and amplifiers. During the war, Tannoy provided 600 communications systems to the Royal Air Force alone, and similar equipment was also requisitioned by the Army and Navy. Users in the military used Tannoy equipment to communicate with each other. As a result, "Tanono" became synonymous with the sound reinforcement system, and by 1948 it was included in the Oxford English Dictionary.