This is a stereo power amplifier with excellent performance, high purity and natural music playback in a simple design. The output stage employs a high-power multi-emitter audio power transistor with a collector loss of 100W and a collector current of 10A. This device has excellent characteristics such as frequency characteristics, current amplification linearity and switching. High output is achieved by connecting this in 4-parallel. The amplifier circuit employs a current feedback amplifier circuit that feeds back the output signal in the form of a current. The principle of this circuit is as follows : First, the impedance of the feedback input terminal is lowered to detect the current, and then the current is converted into I-V (current-voltage conversion) by a transimpedance amplifier to produce an output signal. Since the impedance of the feedback input terminal is extremely low, phase rotation is difficult to occur, and there is almost no need for phase guarantee. Therefore, it has excellent dynamic characteristics such as rise and sound quality is improved by natural energy response. Also, the current feedback amplifier circuit has a feature that its frequency characteristics hardly change depending on the designed gain.