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Subscriber loudspeaker "SMZ" (Saratov) 05-GD-1 since 1945 has been producing the Saratov Machine-Building Plant (Saratov Electric Aggregate Production Association. SEPO). Below is the subscriber speaker information provided by Sergey Nenashev (VINT) from Moscow. The electrodynamic loudspeaker "SMZ 0.5-GD-1" was developed in 1940 for production at the newly built Saratov Engineering Plant of the People's Commissariat of the USSR Aviation Industry, which was planned to be launched in late 1941. The war prevented, therefore, it began to be produced only from 1945 to 1951, when the SMZ was focused on the production of Saratov refrigerators. The AG had a bulky plywood case (320x330x150 mm) in khaki color, but it was distinguished by the novelty of the element base. The speaker had a molded case (basket), a collapsible design (analogues of which were no longer in the USSR) with frequency ranges of 150 ... 5000 Hz. A smooth volume control was installed in the AG, a transformer with a special design with the ability to connect to a broadcast network with a voltage of 15 or 30 volts, which was easy to do with screw terminals. Due to their use, AG assembly was carried out practically without soldering. The volume control knob was located on the front panel of the AG and had the marking of the manufacturer "SMZ". The AG did not have the official name "Saratov", therefore, among the population and collectors, two names "SMZ" or "Saratov" were assigned to it. The quality of the element base and the sound of the AG, at that time, had no equal in the USSR.