Equipped with an optical digital input that realizes high-purity sound reproduction. 24bit / 192kHz compatible D / A converter built-in amplifier. Uses a high-performance D / A converter (AK4396) that supports 24bit / 192kHz. Equipped with high-quality optical digital input that supports 192kHz. Equipped with line output, it can also be used as a high-quality D / A converter. High-rigidity aluminum alloy body and die-cast front panel suppress unnecessary vibration. It suppresses distortion and unnecessary vibration that occur in the main unit itself, and achieves high sound quality. Uses carefully selected audio parts to achieve high-quality sound reproduction. Selected acoustic parts are used for capacitors and operational amplifiers that play high-quality sound. Improves resolution and sound reproducibility. Equipped with a headphone amplifier with low noise and low distortion, clear playback sound. Low noise and delicate expression is reproduced by FET input. Sound reproduction with plenty of room due to the power transistor output method. A large-capacity AC adapter is used to achieve rich low-frequency reproduction with high-output headphones. Equipped with a signal indicator that allows you to check the optical digital input signal. An optical digital signal through-out function that is convenient when building or expanding an AV system.