Horn loudspeaker "R-10".
Amplifying and broadcasting equipmentSince 1947, the R-10 horn loudspeaker has been produced by the Oktava plant in Tula. Horn loudspeaker "R-10" (Horn loudspeaker, power 10 W), is intended for radio communication of squares, streets and for radio broadcasting movements. "R-10" is an electrodynamic loudspeaker, which is made in a special aluminum case, with a powerful permanent magnet. The design of the loudspeaker ensures normal operation in conditions of temperature fluctuations from -40 ° to + 50 ° Celsius and an increase in relative humidity of up to 90 percent. Rated power 10 watts. Maximum power, with a short overload 15 W. The band of reproducible sound frequencies is 250 ... 4000 Hz. Uneven frequency response in the reproducible frequency band of 20 dB. The average value of the sound pressure, measured at a distance of one meter from the horn outlet, in the frequency range 250 ... 2500 Hz, with an input power of 0.1 W, is 6 bar. Loudspeaker weight 6 kg.