The DOD Meatbox is based on the iconic DOD Meatbox circuit design with updated componentsis. Its more than just an octaver, its a thick subharmonic synthesiser as well. Adding in sub notes so low that you need to be careful not to blow your speakers. A TRS out allows you to split the subharmonic synthesised signal out to the P.A. for bone rattling, bowel-shaking bass. FEATURES: Octave Control:Used to increase or decrease the amount of low octave being added to the signal. Turn this clockwise to increase the amount of low octave. Output Level Control:Used to adjust the output level of your signal (when the effect is on). Turn this clockwise to increase the output level. Sub Control:Used to increase or decrease the amount of Synthesized Subharmonic added to the signal. Turn this clockwise to increase the amount of Synthesized Subharmonic. Low Control:Used to increase or decrease the low frequency content of the output, this keeps the extreme lows from overwhelming your amp and speakers. LED Power Indicator:This lights up when the pedal is on.