Electro-Harmonix Q-Tron Plus Envelope Filter with Effects Loop Pedal

Electro-Harmonix Q-Tron Plus Envelope Filter with Effects Loop PedalDedicated effects loop allows you to place any effect or pedal board into the loopFX send and return without changing the envelope driveSelectable low pass, band pass and high pass filtersResonant peak control to adjust the filter's Q from subtle to dramaticSwitchable hi or lo frequency sweep ranges