The Line 6 DL4 MkII guitar effects pedal includes all the sounds and features of the original DL4 Delay Modeler, while also introducing an updated slate of effects. The 15 new MkII delays were pulled from the Line 6 HX family of amp and effects processors, and the 4-Switch and 1-Switch loopers offer up to 240 seconds of record time (expandable to several hours using an optional microSD card).

The DL4 MkII's additional features include an XLR microphone input, MIDI In and Out/Thru connectors, four heavy-duty footswitches with colored halo rings, three bypass options and a jack for connecting an optional expression pedal or two external footswitches. The DL4 MkII is also smaller and lighter than the original DL4, providing extra convenience for modern musicians.
 
The Features
- 30 delays total: 15 new MkII delays drawn from the HX family of amp and effects processors, 14 original DL4 delays and Echo Platter, taken from the rackmount Echo Pro
- Two Looper types: Mono/stereo and pre/post signal path options
- 4-Switch and 1-Switch loopers offering up to 240 seconds of record time
- Identical knob and footswitch layout as the original DL4
- XLR microphone input
- MIDI In and Out/Thru connectors
- Four heavy-duty footswitches with colored halo rings
- Three bypass options
- Jack for connecting an optional expression pedal or two footswitches
- Compact design