bolt-on
Touch-sensitive, distortion circuit, Single master volume control on the face of the instrument, location of the bass and treble controls for the active circuit on the rear cover plate, Designed in collaboration with Bill Gould, bassist for the band FAITH NO MORE, completely handmade by ZON in their Redwood City, California, US facility, finished in satin black, appointed with black hardware and a Hipshot D-tuner
| Construction | bolt-on |
| Body | tulip wood |
| Neck | Composite |
| Fingerboard | Phenowood |
| Neck Pickup | wide-aperture, passive, dual coil |
| Bridge Pickup | narrow-aperture, passive, linear single coil |
| Controls | Single master volume, distortion switch |
| Bridge | ZON machined brass |
Artists documented playing the Zon Guitars Sonus BG4: 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.