PHA
| Manufacturer | Serge Synthesizer |
| Function | Effect (2st generation modules) |
| Produced | 1974 |
| Country | USA |
| Form Factor | Modular - Eurorack |
| Signal Path | Analog Hardware |
| Notes | VC phase shifter |
| Manufacturer | Serge Synthesizer |
| Function | Effect (2st generation modules) |
| Produced | 1974 |
| Country | USA |
| Form Factor | Modular - Eurorack |
| Signal Path | Analog Hardware |
| Notes | VC phase shifter |