Multi-effects units consolidate multiple effects into a single device, offering versatility and convenience. Early models were limited, but modern processors deliver studio-quality tones. Notable models include Line 6 Helix, Boss GT-1000, Headrush Pedalboard, and Fractal Audio FM9. These units are ideal for players needing a wide range of effects without carrying multiple pedals, making them perfect for touring musicians, session players, and home studio users. While some purists prefer analog pedals, modern multi-effects offer incredible flexibility and deep customization.