Acoustic systems "S-30", "S-30A" and "S-30B".

Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Passive speaker systemsAcoustic systems "S-30", "S-30A" and "S-30B" have been produced since 1985 by the Riga plant named after Popov. АС were also referred to as "10АС-221" (S-30) and "10АС-222" (S-30В). And since 1982, according to the previous GOST, the plant has been producing the same speakers with the names "10AS-314" and "10AS-315" (Radiotehnika "S-30").