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Acoustic system "Note 15AS-201" was produced since 1991 by the Novosibirsk PO "Luch". Broadband speakers with bass reflex. The case is rectangular, non-separable, made of chipboard. The dynamic head is located at the bottom, above it is the phase inverter output (sometimes an simulator). The speaker and tube of the phase inverter are covered with a decorative plastic lining with metal painted nets for the speaker and phase inverter. Inside is sound-absorbing material. Outside on the back wall pasted tag with the name of the speaker and the main technical characteristics. On the back wall there are two mounts for hanging speakers on the wall. Specifications: Frequency range 80 ... 20000 Hz. Sensitivity 90 dB. 4 ohm impedance. Ultimate long-term power of 15 watts. Loudspeaker 10ГДШ-1-4 is used. Speaker dimensions - 386х230х233 mm. Weight 6 kg.