The HPA-21 is a truly unique product that is the world’s one and only current driving headphone amplifier.
By incorporating the SATRI Circuit technology, our years of R&D effort in current amplification technology is now perfectly refined for headphone listeners.
Unlike the conventional voltage driving method, the HPA-21’s current driving method achieves far superior driving precision, power and distortion level unmatched by any other available conventional headphone amplifiers. In addition, our latest analogue battery power supply technology has been meticulously analyzed and employed into the HPA-21, which further enhances the performance of the circuit to the next level.
If you demand the best headphone listening experience, look no further. The HPA-21 is here for you to meet your highest expectations.