Duesenberg Violent TremThe pulsing tremolo effect is probably the most magical of all guitar effects. The Violet Trem has a hand calibrated and synchronized photo cell at the heart of its electronics, by which the buttery wet tremolo sound weve come to know and love from the old tube amps is perfectly reproduced. The Violet Trem has a volume control that counterbalances loss of volume that can occur with active effects. Or it can as a booster; left striking the intensity