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The subscriber loudspeaker "Harp" was produced since 1952 by the Voronezh plant "Electrosignal". Arfa AG was created on the basis of the Voronezh AG model of 1952, the Voronezh plastic plant. Since 1954, the Arfa loudspeaker was also produced at the Ryazan Radio Plant. The release of Arfa loudspeakers in Voronezh was short-lived; the main issue was in Ryazan, where AGs were produced until 1965. The loudspeakers 1GD-5 (round) in 1958 were replaced by 1GD-9 (oval), and in the early sixties by 1GD-28 (oval).