| Model | WES |
| Headphones output voltage sw | 1300 volts p-p |
Stax PRO bias |
580V |
Sennheiser HE90 bia |
500V |
| Signal/Noise | >100 dB |
| THD | <= 0.3% |
| Voltage | AC 110/220 - 240V, 50/60 Hz, selectable |
| Power consumption | 118 watts |
| PSU External Dimension (H, W, D) | 114.3mm x 419.1mm x 304.8mm |
| AMP External Dimension (H, W, D) | 190.5mm x 419.1mm x 304.8mm (with tube guard) |
| Weight (AMP + PSU) | 18.2kg |
| Warranty | Electrostatic Tube Amplifier (12 Months) |
| Tubes (90 Days) |