Acoustic systems '' 20 MAS-1 '', '' 20 AS-2 '', '' 25 AS-421 '' and '' Elektronika B1-01 ''.

Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Passive speaker systemsAcoustic systems "20MAS-1", "20AS-2" and "Elektronika B1-01" have been produced by the Kazan plant of radio components since 1975. All speakers are the same and were included in the sets of elektronika B1-01 and Phoenix-001-stereo electrophones, and were also sold separately. The speakers are designed to work together with high-class radio equipment. Rated power: 20W. Resistance: 16 ohms. Frequency range: 40 ... 18000 Hz. Unevenness of the frequency response of sound pressure: ± 9 dB. Average sound pressure: 0.15 Pa. Maximum input voltage: 18 V. SOI at sound pressure at rated power,%, at frequencies, Hz: 63 - 10, 80 -10, 125 - 8, 200 ... 400 - 4, 400 ... 2000 - 3, More than 2000 - 3. Dimensions: 630x340x250 mm. Weight: 21 kg. Price 135 rubles. Since 1979, the plant has been producing a similar speaker with the name "25AS-421".