PURPOSE: To eliminate the crosstalk between the channels of the multi-channel feedback-type amplifier by negating the crosstalk with addition of a simple-structure passive or active circuit.

CONSTITUTION: Input sigals v1 and v2 of the multiple channels are applied to channel feedback amplifiers g1 and g2 containing load feedback circuits f1 and f2. When the transmission relation of crosstalk routes K12 and K22 from one channel to another is referred to as K, part of the feedback signal of amplifier g1 of one channel is applied to the input side of amplifier g2 of the other side via branch circuit j12. And one side of the feedback signal of amplifier g2 is applied to the input side of amplifier g1 via branch circuit j21. These circuits j12 and j21 are formed so as to satisfy the transmission functiok of j=[(1+f)g/f, g]K. Thus the crosstalk can be eliminated between channels, where f is the transmission function of the feedback lines of amplifiers g1 and g2, and g is the transmission function of amplifiers g1 and g2 respectively.