Made in the 1980s, the DM-3 was the last analog delay produced by Boss, building on the now-vintage sounds of its older sibling, the DM-2. Adding an additional filter and high-speed noise reduction to the earlier circuit, the DM-3 also features a Direct Out jack, which lets you run 2 amps, for a pseudo-stereo effect. That is hands-down one of the best features of this pedal, and why I keep coming back to it after all these years.