The Bakoon HPA-21 is a top tier and compact Solid State amp with Great Precision, but also has a Euphonic tube-like sound. The unit functions flawlessly, but has a small ding on the left front top edge about the size of a pencil tip. The price reflects the cosmetic imperfection. I did rate it fair to be safe. All the original packaging and accessories are included. Price also includes shipping and PayPal fees. I forgot to mention that the Bakoon did power my Hifiman HE-560's with ease. MSRP- $2995
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. These advanced circuits are thoroughly packed and housed inside the case CNC machined and finished to the highest industry standards.
If you simply demand the best headphone listening experience, look no further. The HPA-21 is here for you to meet your highest expectations.
Input1 SATRI-LINK (BNC), 1 Voltage (RCA)Input Impedance100 KΩ (Voltage), 3.68 Ω (SATRI-LINK)OutputCurrent / Voltage (simultaneous)GainHigh / Low switchable (current output only)Maximum Power Output1 watt (50 Ω, 1 kHz)Frequency Response10 Hz ~ 1 MHzBattery TypeLi-ionBattery Operate TimeUp to six and a half hoursBattery Recharge Time4 hours (80% capacity) / 6 hours (full capacity)Dimensions195 mm (W) x 237.5 mm (D) x 55 mm (H)Shipping Weight