Guitar tube combo amplifier `` Maria ''.
Amplifying and broadcasting equipmentThe guitar tube combo amplifier "Maria" was produced at the Leningrad factory of plucked folk musical instruments named after V.I. Lunacharsky since 1975. The combo amplifier was sold as a set: 2 combo Maria + a set of three guitars of the same name series Maria Ritm, Leader and Bass. The electronic part, in the form of a chassis with an amplifier "Rhythm", was produced at the Lyubertsy plant of electro-musical instruments "Rodina". At the Lunacharsky factory, only "boxes" were made, pasted over with dermantine, in which the amplifier chassis and dynamic heads were installed. If you remove the decorative bezel with the inscription "Maria", then the label of the amplifier "Rhythm" will appear under it. Characteristics of the amplifying-acoustic device: The range of reproducible frequencies with uneven frequency response +/- 1.5 dB - 60 ... 12000 Hz. Rated output power at a load of 10 ohms - 20 watts. The maximum output power is 25 watts. Sensitivity Input-1 - 25 mV. Input-2 - 100 mV. The level of its own noise and background of the amplifier is not more than 60 dB. Nonlinear distortion coefficient at a frequency of 1000Hz is not more than 1.5%. Tone control at frequencies of 100 and 10000 Hz in relation to 1000 Hz - 12 dB. The power of the loudspeakers in the loudspeaker is 30 W. Power consumption from the network is 160 W. The weight of one combo amplifier is 20 kg.
