Ключевые слова: 3d, amplification, amplifier, analogue, area, audio, background, black, blank, blue, closeup, control, decibel, electronics, entertainment, equipment, fidelity, gain, gradual, hifi, high, indicator, knob, level, light, listening, loud, loudness, measure, music, player, pointer, pump, radio, receiver, round, scale, silence, silver, single, sound, speakers, stereo, tech, technology, tone, tune, tuner, tuning, volume,