The Boss BF-2 Flanger is a classic analog flanger that produces everything from subtle swirling movement to dramatic jet-airplane sweep effects. Its sound is brighter, sharper, and more metallic than many modern flangers, which helped make it popular in rock, new wave, alternative, and metal music. With controls for Manual, Depth, Rate, and Resonance, it offers a wide range of textures, from gentle chorus-like modulation to aggressive, resonant flanging.