Audio brand of Kumamoto who knows who knows.
An amplifier equipped with a proprietary SATRI-IC circuit attracts overseas audio fans.
You can choose SATRI LINK of voltage output and current output.
By setting the current output, the amount of information is large compared to the voltage output, and there is a reproduction with less distortion.
Especially headphone amplifier HDA-5210MK3 is popular for affordable prices.