4-string · Bolt-on
Double action truss rod 4-string, per the product category Thomann files this model under (Thomann is Harley Benton's own house brand).
| Construction | Bolt-on |
| Strings | 4 |
| Body | Poplar |
| Neck | Maple |
| Fingerboard | Laurel |
| Neck Pickup | JB-Style single coils |
| Controls | 2 Volume & 1 Tone |
| Bridge | Chrome |
Artists documented playing the Harley Benton JB-20 CA: Marti Fischer.