Quadratt 1U by Intellijel

The four handy knobs can act as active attenuators (unipolar) or attenuverters (bipolar) depending on the setting of the two-position switches above each channel.

Each input is normalled to a precision +5V DC voltage source. With nothing plugged into the jacks, each knob controls a voltage range of 0V to +5V or -5V to +5V depending on the position of the mode switch. This is great for setting up “performance macros” in your patch to control multiple parameters with a single knob.