Abstract: It is an object of the present invention to provide an acoustic system which, when producing a sound from pillow speakers, can provide a natural feeling, without bringing about any incongruity to a listener. The acoustic system is provided with a low pass filter for extracting a low frequency component of a reproduction signal outputted from a signal source and supplying the extracted signal to pillow speakers, and a high pass filter for extracting a high frequency component of the reproduction signal and supplying the extracted signal to a normal position speaker, thereby fixing a sound emitted from the pillow speakers and a sound emitted from the normal position speaker on the normal position speaker side.

Abstract: An audio output mode setting apparatus for setting an output mode of audio signals to a plurality of speakers which are located at mutually different positions including: a detection device which detects a direction of a seat on which a listener of the audio signals which are outputted from the speakers sits; and an output mode setting device which sets up an output mode of the audio signals respectively to the speakers in response to the detected direction of the seat.