bolt-on · fretless
Soapbar style shell. bridge pickup: medium aperture, passive, planer coil design. Soapbar style shell. controls: Master volume, pickup blend, dual independent stacked bass/treble controls with 3 position boost switch. bridge: ZON. Machined brass. fretless. Fretless -lined, blank or half lined. (no dots on board face), Bookmatched exotic wood tops, Matching headstock, Transparent colors, Solid colors, Black hardware, Hipshot x-tender, Left-handed
| Construction | bolt-on |
| Body | Two-piece select mahogany core with figured Maple top |
| Neck | Composite |
| Fingerboard | Phenowood |
| Neck Pickup | medium aperture, passive, planer coil design |
Artists documented playing the Zon Guitars Sonus Studio 4: Adam Duce, Billy Gould, Chris Wolstenholme, Cody Wright, Conner Green, Dick Lövgren, Jeph Howard, John Wetton, Liam Wilson, Max Lavelle, Mel Schacher, Paulo Jr., Robert Trujillo, Tony Choy, Troy Sanders.