To perform correction corresponding to the real reactance characteristics of a speaker.

A reactance characteristic determining part 12 finds the real reactance characteristics of a speaker 15, and an arithmetic part 18 generates an error signal e(n) as the difference of a target response d(n) and a speaker terminal voltage d(n). An adaptive signal processor 11 is provided with an adaptive filter 11a, filter 11b for generating a reference signal r(n) to be used for adaptive signal processing by convolving reactance characteristics C into an audio signal x(n), and adaptive signal processing part 11c for determining the coefficient of the adaptive filter 11a by performing adaptive signal processing so as to minimize the power of the error signal e(n) when the audio signal x(n) is respectively inputted to the adaptive filter 11a and the filter 11b for reference signal generation, and generates an audio signal y(n) to be inputted from the adaptive filter 11a to an amplifier 14.