The DL4 by Line 6, introduced in 1999, is one of the first digital modeling effects units.[1] The DL4 features models of 16 vintage delay effects, including the Echoplex, Roland Corporation's Space Echo, and the Electro-Harmonix Deluxe Memory Man.[2] It is also used for looping.[3] According to a May/June 2000 review in Canadian Musician, it "delivers a cavalcade of features for a reasonable price."[4]
It’s a staple on live pedalboards the world over.[5]