Update - New, smaller, case designs! Available NOW! Aguilar pedals have been made smaller by reducing the “lip” around the edges of the pedal. By reducing this lip, you can now use ANY right angle plugs regardless of barrel size! And with a flat surface on the bottom of the pedal, mounting to a pedal board is easier than before! The Filter Twin uses two identical filters sweeping in opposite directions - one up in frequency, one down in frequency - to give classic 70"s-inspired funk sounds or completely new and original filter tones. Two filters sweeping at the same time give you a more organic, vocal quality and allow you to get expressive new sounds that you can"t get from other pedals. The Filter Twin offers unique filter effects via an intuitive four-knob layout. The blend control allows you to adjust the mix between the filters. The threshold control determines how sensitive the unit is to different playing styles. The velocity controls determine the speed of each filter.