Line 6 changed the way guitarists thought about delay when the DL4 arrived in 1999. The iconic green stompbox became a fixture on professional pedalboards worldwide almost immediately — offering 16 meticulously modelled delay types, a built-in loop station, and a level of sonic versatility that no single analog pedal could touch. From pristine tape echo simulations to cavernous, modulated swells, the DL4 delivered a universe of time-based texture in one rugged, road-worthy enclosure. Few pedals have shaped the sound of modern guitar playing as profoundly.