Please find reviews below
http://www.ayonaudio.com/reviews/digital.html
Ayon Audio HA-3 Headphone amp review by ” High Fidelity ” Magazine Issue 151
http://highfidelity.pl/@main-709&lang=en
AYON AUDIO HA-3 Specifications
Tube Headphone amp | Ayon HA-3 |
Class of Operation | Pure Class A, SE-Triode |
Tube Complement | 2 x AA45 Mesh, 2 x 12AU7 |
S/N Ratio | > 100dB (unweighted) |
Input Impedance | 50 kΩ |
Frequency Response at 32Ω | 15 Hz – 35kHz |
Harmonic Distortion (at 150mV ) | < 0.01% |
Channel Separation L/R | > 89dB |
Output Power at 32Ω | 500mV |
Output Impedance – Headphone | 16Ω – 600Ω |
Line Input | RCA phono sockets |
Headphone output | ¼” Stereo Jack (6.35mm) |
Power Consumption | ~ 65W |
Dimensions Main Unit (WxDxH) cm | 22x30x20 cm |
Dimension Power Supply (WxDxH) cm | 22x30x10 cm |
Weight (Main) | 8kg |
Weight (Power Supply) | 7kg |