FIELD: physics, acoustics.
SUBSTANCE: invention relates to amplifiers and can be used in audio frequency power amplifiers incorporated with acoustic systems. Amplifier connected with electro acoustic transducer comprises amplifying component, capacitor, positive feedback loop, low-pass filter, or high-pass filter, or negative feedback loop with capacitor, or negative feedback loop with low-pass filter. Or positive feedback signal is digitized to generate the amplitude-frequency response. Said amplifier makes the band-pass filter. Correction of amplitude-frequency response of said amplifier consists in adjustment of positive feedback depth depending on output signal level.
EFFECT: expanded linear amplitude-frequency response by sound pressure in low frequency band.
5 cl, 16 dwg
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