The JC-40 has three FOOT SWITCH jacks (CHORUS/VIBRATO, REVERB, DISTORTION), each controlling the corresponding effect on and off. The following footswitches (sold separately) are compatible: BOSS FS-5L, FS-6, and FS-7.
To control all three effects independently, use one of the following combinations:
- One FS-6 or FS-7, and one FS-5L
- Three FS-5L units
For connection details, refer to "Panel Descriptions - Rear Panel" in the JC-40 Owner's Manual.