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Amplifier complete "Delta RK-001-stereo" from the radio designer since the autumn of 1988 was produced by the Vologda plant Electrotechmash. This is probably one of the most difficult RK ever produced in the USSR. The design was really borrowed from the amplifier "JVC-A-X400" (the first photo), but the scheme is its own. From the RK it was possible to assemble a full stereo amplifier of the highest complexity group with an output power of 2x50 W (nom). The amplifier is equipped with a touch switch inputs, seven-band graphic equalizer, output power selector and other service devices.