Boss FS-6 Power Modification

This page documents the modification I made to my Boss FS-6 dual footswitch to accept line power in addition to battery.

I don't understand why Boss would make a pedal that requires power but lacks a jack for a power supply. So, I added one.

(Click for larger images)

5.5mm x 2.1mm DC power jack connected to the battery leads on the circuit board     Closer image of 5.5mm x 2.1mm DC power jack connected to the battery leads on the circuit board

I soldered leads to a 5.5mm x 2.1mm DC power jack (center negative) and soldered the other end of the leads to the battery connections on the circuit board. I left the original battery connector in place in order to keep that option available.


Power jack mounted on the back of the FS-6

I drilled a 5/16" hole between the center and the “A” jack positions, and mounted the jack to the back panel.


FS-6 mounted on my pedal board with connected to DC power line

Here is the FS-6 with the finished power modification mounted onto my pedalboard.