Overdrive (Compressor/overdrive (BB Preamp-style))
The Joyo R-04 Zip Amp is an analog compressor/overdrive (BB Preamp-style) pedal based on the Xotic BB Preamp-style, with Low, High, Drive, Volume, Mode (compression) switch, LED Toggle controls, made in China.
| Category | Overdrive (Compressor/overdrive (BB Preamp-style)) |
| Circuit / based on | Xotic BB Preamp-style |
| Signal | Analog |
| Controls | Low, High, Drive, Volume, Mode (compression) switch, LED Toggle |
| Switches | Compression mode toggle (normal/compressed); LED mode toggle |
| Footswitches | 1 |
| Bypass | true bypass |
| True bypass | Yes |
| I/O | Mono in / mono out (6.35mm) |
| Power | 9V DC (center negative) |
| Power draw | 20 mA |
| Dimensions | 109 x 67 x 48 mm |
| Weight | 248g |
| Country of manufacture | China |