DRIVING CIRCUIT SYSTEM OF MULTIWAY SPEAKERS

摘要

PURPOSE:To perform reproduction of high fidelity by so forming the system that the middle frequency signal to be applied to a speaker for sounding of middle frequency signal and the signal of a crossover frequency range are respectively added and synthesized and the synthesized signal is negatively fed back to the input side. CONSTITUTION:The output squawker terminal voltage of a band-pass filter 5 is drawn out from an equalizer circuit 9. The high frequency signal drawn out from a high-pass filter 10 is added and synthesized through a resistance R2 and the low frequency signal having been drawn out from a low-pass filter 11 through a resistance R3 with the middle frequency range having been obtained through a resistance R1 from an equalizer circuit 9, after which the synthesized signal is negatively fed back to the inversion output terminal of an amplifier 2. This synthesized signal is approximately constant in its amplitude change in the entire frequency range and yet it is virtually free from phase changes and is suitable as the signal for negative feedback.