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Amplifier-acoustic device "Helios-1500-2" since 1987 produced the Kazan factory of writing devices. UAU provides amplification of signals from electronic musical instruments (rhythm guitars, solo guitars, organ) allowing you to sound medium-sized pop halls. It consists of an amplifier LF "Helios-1500" and a remote speaker "Helios-100". The model includes: indication of overload during short circuits, overheating; Vibrato mode controls for depth and frequency for each input; Vibrato, reverb and volume buttons on and 10 dB; high and low frequency filters with adjustable cutoff frequency; jacks for connecting electronic musical instruments, reverb, remote control, speakers. The body of the device is metal, lined with artificial leather. Rated output power 100 watts. Frequency range 20 ... 20000 Hz. The harmonic coefficient at a frequency of 1000 Hz is not more than 0.3%. Sensitivity from the inputs of high-resistance 250, medium-resistance 20 mV. The signal / noise ratio is not worse than -60 dB. The adjustment range of the bass and treble 12 dB. Input impedance acoustic speaker 4 ohms. The depth of the amplitude modulation of the signal in vibrato mode is at least 40%. The frequency tuning range of the vibrato generator is from 1 to 10 Hz. Powered by 220 V electrical mains. A consumable 250 watt of mains power. Dimensions of the amplifier 490x400x190 mm, one speaker 1174x557x410 mm. Amplifier weight 16 kg, AC 52 kg.