The A/DA Final Phase is an iconic analog phaser effects pedal praised for its deep, resonant sweeping tones and integrated overdrive feature. It employs multi-stage phase shifting alongside regenerative feedback and distinctive sweep modulation to produce lush, swirling textures that can vary from gentle undulations to bold, rhythmic patterns. The controls consist of sweep rate, sweep modulation, range, intensity, and an overdrive section that introduces harmonic distortion to the phasing effects, allowing for a wide range of tonal possibilities.