Compressor (Variable-gain Compressor)
The Marshall ED-1 Compressor is a variable-gain Compressor pedal based on the Classic variable gain compression (Marshall's own wording; topology not stated), with Emphasis (Hi/Lo), Volume, Attack, Compression controls.
| Category | Compressor (Variable-gain Compressor) |
| Circuit / based on | Classic variable gain compression (Marshall's own wording; topology not stated) |
| Controls | Emphasis (Hi/Lo), Volume, Attack, Compression |
| Switches | On/Off switch |
| Footswitches | 1 |
| Bypass | Passive bypass |
| I/O | 1 x 1/4" jack input, 1 x 1/4" jack output, 9V DC input; input impedance >1 MOhm, output load impedance <20 kOhm |
| Power | 9V DC centre-negative regulated, or 9V PP3 battery |
| Power draw | 5 mA |
| Battery power | Yes |
| Dimensions | 120 x 65 x 55 mm |
| Weight | 510 g |