| 摘要 |
PROBLEM TO BE SOLVED: To provide an audio system by which sound is reproduced in an excellent way. SOLUTION: An input selection circuit 20 is provided to an input side of front power amplifiers 6L, 6R and rear power amplifiers 11L, 11R, an output selection circuit 30 is provided to an output side of the power amplifiers 6L, 6R and the power amplifiers 11L, 11R, in the case of reproducing a system A, the input selection circuit 20 outputs a front audio signal to the power amplifiers 6L, 6R and outputs a rear audio signal to the power amplifiers 11L, 11R, the output selection circuit 30 outputs the outputs of the power amplifiers 6L, 6R to a front speaker output terminal of the system A and outputs the output of the power amplifiers 11L, 11R to a rear speaker output terminal. In the case of reproducing the (A+B) system, the input selection circuit 20 outputs the front audio signal to the power amplifiers 6L, 6R and the power amplifiers 11L, 11R, and the output selection circuit 30 outputs the output of the power amplifiers 6L, 6R to the front speaker output terminal of the system A and outputs the output of the power amplifiers 11L, 11R to a front speaker output terminal of the system B. |
