| USA | Selling my Source Audio C4 Synth Engine, she’s super diverse, customizab... | $180.00 | |
| USA | Source Audio C4 Synth Guitar/Bass synth pedal. 2020s. Mint condition. Be... | $200.00 | |
| USA | Minimal wear and tear (never played out with, just for at home). Great p... | $179.00 | |
| USA | Perfect Condition with velcro on back. Comes with packaging.
![Source ... | $190.00 | |
| USA | Like new in box. Kept in home studio. Comes with power supply and Hot Ha... | $185.00 | |
| USA | Some light marks on the enclosure. Includes original packaging and acce... | $190.00 | |
| USA | Source Audio C4 Synth. Comes with box and TRS and power cable. Studio us... | $200.00 | |
| UK | Selling my much loved C4 - downsizing pedalboard and can't justify keepi... | $304.02 | |
| USA | Great pedal! Lots of fun sounds from this one. An industry pinnacle of f... | $210.00 | |
| USA | Need a new stomp box? Of course you do. This one sounds amazing, is very... | $209.00 | |