| Model ID | Williamson Type Amplifier |
| Signal Path | Analog Hardware |
| Dimensions | 14 × 17.8 × 27.9 cm (W × H × D); 14 × 17.8 × 27.9 cm (W × H × D) |
| Weight | 39lbs |
| Power | 105-125VAC, 50/60Hz 120W |
| Frequency Response | 10Hz-100kHz ±1dB |
| Output Power | 20W |
| THD (20Hz-20kHz, 5W) | 0.5% |
| IMD (60Hz:3kHz, 5W) | 0.5% |
| Impedance Load | 4/8/16Ω |
| Input Sensitivity (5W) | 0.75V |
| Input Impedance | 2.2MΩ |
| Output Tube | 5881 |
| Tube Complement | 6SN7GT (x2), 5881 (x2), 5V4G |
| Output Transformer | Acrosound TO-300 |
| MSRP (1952) | $49.75 |
| Channels | 1 Channel |
| Notes | W-2M amplifier with upgraded output transformer. |
