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Acoustic system "15AS-225" was produced since 1987 by the Novosibirsk Precision Engineering Plant. The speakers were supplied with the Kometa-225S tape recorders and some others. Two-way bass reflex speaker. Rated power 15 watts. Ultimate long-term power of 25 watts. The frequency range is 63 ... 16000 Hz. The level of average sound pressure at an electric power of 10 W in the frequency range 200 ... 4000 Hz, not less than 92 dB. 4 ohm impedance. Dynamics: LF 25GDN-3-4, HF 5GDV-1. Dimensions AU - 328x190x190 mm. Weight - 5.8 kg. Since 1989, the AU has been produced - "25AS-225" is almost similar to that described.