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Acoustic systems "15ÐС-109" and "15ÐС-110" since the beginning of 1983 have been producing Berd software "Vega". Speakers are designed for high-quality reproduction of speech and musical sound programs in stationary conditions. The recommended amplifier power is 20 ... 25 W. Technical characteristics of the AU: The range of reproducible frequencies in the conditions of free half-space is 50 ... 20000 Hz. Uneven frequency response at the lower frequency of 8 dB. The level of sensitivity of the AU (Pa / W) - 84 dB. Irregularity of the frequency response of sound pressure in the range of 100..8000 Hz ± 4 dB. Harmonic distortions in the frequency range 250 ... 1000 Hz - 2%, 1000 ... 2000 Hz - 1.5%, 2000 ... 6300 Hz - 1%. The rated electrical resistance "15ÐС109" - 4 Ohm, "15ÐС110" - 8 Ohm. The minimum value of the electrical resistance of the speakers, respectively, 3.2 Ohm and 6.4 Ohm. Extreme noise (passport) power 25 watts. The maximum power of 50 watts. Type of bass design - phase inverter. Dimensions of any speaker - 360x220x190 mm. Weight 6.8 kg. Since 1988, the software "Vega" in accordance with GOST 23262-88 has produced analogue speakers but with a higher working power "25AS-101" and "25AS-102".