| Model ID | Earspeaker-Adaptor SRD-4 |
| Form Factor | Desktop |
| Signal Path | Analog Hardware |
| Dimensions | 9 × 6.6 × 119.4 cm (W × H × D) |
| Weight | 860g |
| Frequency Response | 10Hz-30kHz ±2.5dB |
| Continuous Maximum Input (1kHz) | 5W |
| Momentary Maximum Input (1kHz) | 30W |
| THD (1kHz/1W) | <0.02% |
| Channels | 2 Channel |
| Connections | - Speaker (Out) · Spring Terminal · Stereo
- Earspeaker · DIN · Stereo, Socket (Female)
- Input (Speaker Level) · Other · Stereo
|
| Controls | - Earspeaker/Loudspeaker · Rotary Switch · 2
|
| Notes | Used with the SR-30, SR-40, SR-80 (early) and other Stax electret earspeakers. |
