Why does the JD7 have polarity reverse switches?
Many amplifier and effect pedal manufacturers assume that you will only be using their product and as such, they may end up being ‘out of phase’ or to be more precise, be polarity reversed from one and other. This of course only matters when you play several of these together at the same time. As this is the intended function of the JD7, the polarity reverse allows you to ‘line-up’ all of the amplifiers and pedals so that you get them all working together.
