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The acoustic system "30A-188" has been produced by LOMO since 1985. The loudspeaker "30A-188" is intended for reproducing sound in complexes of equipment for vocal-instrumental ensembles and in other sound reproduction systems. 2-way speakers are made in the form of a wooden box with a phase inverter. Two "4A-32-2" heads were used as the low-level link, and "1A-22" heads with a horn were used as the high-frequency link. LF and HF heads with a mouthpiece and two phase inverter tubes are fixed on the front wall of the speaker enclosure. The restrictive filter is mounted on the chassis and fixed inside the case. For access to the heads and the restrictive filter, the rear wall of the loudspeaker is removable and mounted on screws. To move the speakers, roller rollers are provided, and for carrying special handles. Specifications: Passport power 100 watts. Nominal frequency range 50 ... 16000 Hz. The nominal module of the total electrical resistance depends on the cable and is 8 ... 30 ohms. Overall dimensions of the speaker are 802x632x388 mm. Weight 45 kg.