DL4 has become a classic in its own right, as popular with guitarists as it is with singers, drummers, bassists, keyboardists, and anyone who wants a pure 24-bit true stereo signal path in the service of delays that run the gamut from gritty. Models of classic delay boxes—and the sweet choruses and vibratos that accompany many of them—are just the beginning; the DL4 also boasts innovative sounds like its “Auto-Volume Echo,” which combines a volume swell with a tweakable tape-style echo; or the outstanding “Reverse Delay,” which allows you to play stunning backwards guitar solos on the fly.