A speaker apparatus in which a reproduced sound from a speaker unit is
detected by a microphone and the reproduced sound from the speaker unit
is corrected based on the detected signal. The speaker apparatus includes
the speaker unit for reproducing an output signal from an amplifier, the
microphone for detecting an acoustic output from the speaker unit, and a
feedback circuit for feeding the detected acoustic output signal back to
the input side of the amplifier. By placing the microphone near a
position where sound pressure of at least one of a second and higher pipe
resonance of an acoustic pipe is at minimum, an influence of the second
and higher pipe resonance is reduced. As the influence of the second and
higher pipe resonance is removed from the feedback circuit, stability of
the feedback circuit is improved, and therefore, an acoustic
characteristic of the speaker apparatus is improved.