Amplifying-acoustic device "Helios-1500-2".
Amplifying and broadcasting equipmentSince 1987, the amplifying-acoustic device "Helios-1500-2" has been producing the Kazan Writing Devices Plant. UAU provides amplification of signals from electronic musical instruments (rhythm guitar, lead guitar, organ) allowing to sound medium-sized pop halls. Consists of a LF amplifier "Helios-1500" and an external speaker "Helios-100". The model provides: indication of overload in case of short circuits, overheating; regulators of the "vibrato" mode for depth and frequency for each input; buttons for switching on the "vibrato", "reverberation" mode and lowering the volume by 10 dB; filters for high and low frequencies with an adjustable cutoff frequency; sockets for connecting electronic musical instruments, reverb, remote control, acoustic systems. The body of the device is metal, lined with artificial leather. Rated output power 100 W. The range of reproducible frequencies is 20 ... 20,000 Hz. Harmonic distortion at a frequency of 1000 Hz is not more than 0.3%. Sensitivity from inputs of high impedance 250, medium impedance 20 mV. The signal-to-noise ratio is not worse than -60 dB. The range of adjustment of the bass and treble tone is 12 dB. The input impedance of the speaker is 4 ohms. The depth of amplitude modulation of the signal in vibrato mode is not less than 40%. The frequency tuning range of the "vibrato" generator is from 1 to 10 Hz. Power supply from an electrical network of 220 V. Power consumption from the network is 250 W. Dimensions of the amplifier 490x400x190 mm, one speaker 1174x557x410 mm. Amplifier weight 16 kg, speaker 52 kg.
