Fulltone-exclusive “Order switch” which places the Boost channel either before or after the Overdrive section of the circuit: After takes whatever sound you have set and increases the Volume so you pop out of the mix. Before the input of the Overdrive channel and increases the distortion, there's not a substantial increase in volume, which is more like the FD2.

Completely independent, discrete JFET Clean Boost channel that can be used by itself! This channel has its Volume control and a unique mini-knob controlling the Germanium Diode "Limiter" function that has to be felt to be really appreciated! Clockwise on this knob takes out the strident, irritating spikes that occur with other clean boosts when you hit the strings hard....absolutely gorgeous feature destined to be a classic. This Boost circuit does not invert the signal like most clean-boosts and can be used with or without the overdrive section of the pedal.

The Icing on the cake? The housing is about 20% smaller than the traditional FullDrive2