The application of electric echo effects in music traces back to the 1950s. One prominent device, the Echoplex, emerged in 1959 as a tape delay effect, simulating acoustic echoes. Mike Battle's design established the standard in the 1960s, favored by prominent guitarists. Market's solid-state Echoplex for Maestro emerged in the 1970s. Contemporary echo units, predominantly from the 2000s, employ electronic or digital circuitry for the effect's recreation, marking a departure from the tape-based approach of the past.