Bakoon Products HPA-21 Headphone Amplifier

Bakoon Products

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.

    If you demand the best headphone listening experience, look no further. The HPA-21 is here for you to meet your highest expectations. 

    • 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. 
  • Input: 1 SATRI-LINK (BNC), 1 Voltage (RCA)

    Input Impedance: 100 KΩ (Voltage), 3.68 Ω (SATRI-LINK)

    Output: Current / Voltage (simultaneous)

    Gain: High / Low switchable (current output only)

    Maximum Power Output: 1 watt (50 Ω, 1 kHz)

    Frequency Response: 10 Hz ~ 1 MHz

    Battery Type: Li-ion

    Battery Operate Time: Up to six and a half hours

    Battery Recharge Time: 4 hours (80% capacity) / 6 hours (full capacity)

    Dimensions: 195 mm (W) x 237.5 mm (D) x 55 mm (H)

    Shipping Weight: 4.5 kg