Electro Harmonix Wiggler Tube Vibrato Tremolo Description: The all-tube Wiggler will bring you back to the 1960's with its re-creation of the most sought after modulation effects that until now were only found in classic guitar amps. Using an all-vacuum tube audio path, The Wiggler creates 4 different types of note-bending vibrato and true amplitude modulation tremolo with the amazing clarity and warmth that older generations once took for granted.