Subscriber loudspeakers VEFPER-45 and VEFPER-1-46.
Subscriber loudspeakers.DomesticSubscriber loudspeakers "VEFPER-45" and "VEFPER-1-46" were produced by the Riga State Electrotechnical Plant VEF since 1946 and 1947, respectively. Loudspeakers are designed for high-quality reproduction of programs transmitted over radio transmission lines, as well as for using them in conjunction with radio receivers having lower acoustic performance of their acoustic systems. The loudspeaker `` VEFPER-45 '' began to be produced in the design as in the first left photo below in the photo gallery in a wooden case in several design options. Then, from about the fall of 1946, the loudspeaker was produced in a bakelite enclosure. Since 1947, the loudspeaker has been produced under the name VEFPER-1-46. In both subscriber loudspeakers, a high-quality, sensitive loudspeaker with a large cone diameter and a working frequency range of 100 ... 6300 Hz is used.
