EV-10 Expression Pedal
A lot of pedals and rack mounted units have an input for an expression pedal like the EV-10. The expression pedal will enable the player to adjust one paramter of the unit it is connected to. In the case of a FT-2, Dynamic Filter, it will turn the pedal into a proper wah pedal. If connected to a PH-3, Phase Shifter, the expression pedal will adjust the rate control.
The EV-10 was replaced by the Roland EV-5 very early so there aren't that many EV-10s around. It is very solid as it is made by the same heavy-duty diecast aluminum housing that's on the BOSS FV-200 and FV-100. The Roland EV-5 is for comparison made of plastic. There's a minimum volume adjustment knob that allows the user to select the degree of effect and volume desired at the minimum point.
Specifications