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Line 6 DL4 MkII Delay Modeler Pedal

Delay Modeler Pedal with 30 Delay Models, 15 Reverbs, 240-second Looping, Mic Input, and MIDI
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The Ubiquitous Green Delay Modeler — Part Deux

The original Line 6 DL4 Delay Modeler is a pedalboard mainstay on arena stages, worship platforms, and bedroom floors all over the world. The DL4 MkII honors the legacy of the familiar little green time machine, boasting the same knob and footswitch layout as its predecessor, along with all of its original sounds and features. That said, the MkII eclipses its forerunner with 15 new HX-derived delay models, a selection of ear-grabbing reverbs, and 1- and 4-switch loopers with up to 240 seconds of recording time, which is expandable to several hours via the pedal's microSD slot. You also get an XLR microphone input, comprehensive MIDI connectivity and control, switchable true/buffered/DSP bypass, and an expression pedal input. The Line 6 DL4 MkII Delay Modeler is everything the original was and more. So, if you're searching for feature-laden delay stompbox with industry-leading sound, then this is the one to get.

30 kinds of delay… delay… delay…

Searching for a direct replacement for your aging DL4? The MkII is the perfect remedy for your Tube Echo, Multi-Head, Lo Res Delay, and other classic DL4 cravings. Not only does the MkII contain all its forerunner's sounds, you also get the familiar Tweak and Tweez controls for fast-and-simple adjustability. The DL4 MkII Delay Modeler is also loaded with 15 modern HX-derived effects, arming your with everything from a spot-on Vintage Digital emulation to a mind-blowing ADT patch to Line 6's vibe-infused Glitch Delay. You also get 15 killer reverb algorithms, which include Room, Cave, Plate, Chamber, Spring, and more.

Includes two feature-laden loopers

The Line 6 DL4 MkII Delay Modeler is tailor-made for looper aficionados. It features a simple 1-switch looper and a classic 4-switch looper, both of which yield you up to 240 seconds of recording time. Are you a loop-aholic? If that's the case, loading a microSD card into the MkII will grant you hours upon hours of recording time that can be stored across power cycles. Here at Sweetwater, we appreciate this looper's flexible functionality; it can operate in either mono or stereo, and it can be positioned before or after other effects in your signal chain. Beyond that, the DL4 MkII includes an XLR microphone input, enabling you to loop vocals — and more — without resorting to converter cables, mixers, or other external devices.

Primed for mind-blowing MIDI magic

Players who deploy a MIDI-controlled rig will find much to love about the DL4 MkII Delay Modeler. Its MIDI In and Out/Thru DIN connectors enable it to receive continuous controller, program change, and other MIDI messages from your MIDI controllers. Thus, you can modify your parameters dynamically and select presets remotely. You get access to three presets via A, B, and C footswitches, or six if you set the Tap switch to toggle between two preset banks (A,B, C and D, E, F). The MkII can store up to 128 MIDI-selectable presets — more than enough to tackle even the most demanding of set lists.

Line 6 DL4 MkII Delay Modeler Pedal Features:

  • The 2nd iteration of the venerable DL4 Delay Modeler
  • Boasts the same knob and footswitch layout as its predecessor
  • Contains all of the sounds of the original pedal, plus 15 modern HX-derived effects and 15 reverbs
  • 1- and 4-switch loopers supply up to 240 seconds of recording time
  • microSD card unleashes extended recording time that can be stored across power cycles
  • Looper can operate in either mono or stereo, and it can be positioned before or after other effects
  • XLR microphone input enables you to loop vocals without resorting to external converters or other devices
  • MIDI In and Out/Thru DIN connectors accommodate CC, program change, and other MIDI messages
  • Modify your parameters dynamically and select presets remotely
  • 3 presets via A, B, and C footswitches, or 6 if you set the Tap switch to toggle between 2 preset banks (A,B, C and D, E, F)
  • Stores up to 128 MIDI-selectable presets
  • Switchable true/buffered/DSP bypass
  • Expression pedal input

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Tech Specs

  • Pedal Type: Delay
  • Analog/Digital: Digital
  • Presets: 6 x User, 128 via MIDI
  • Effects: 30 x Delay, 15 x Reverb
  • Max Delay Time: 4 seconds
  • Looping Time: 2 minutes (stereo), 4 minutes (mono), Expandable to several hours with microSD card
  • Tap Tempo: Yes
  • Inputs: 2 x 1/4" TS (L/mono, R), 1 x XLR (mic/instrument)
  • Outputs: 2 x 1/4" TS (L/mono, R)
  • MIDI I/O: In, Out/Thru, USB
  • Other I/O: 1 x 1/4" (expression/dual external footswitch/one of each)
  • USB: 1 x USB-C
  • Bypass Switching: True Bypass, Buffered, DSP
  • Power Source: 9V DC 500mA power supply (included)
  • Height: 2"
  • Width: 9.25"
  • Depth: 4.5"
  • Weight: 2.07 lbs.
  • Manufacturer Part Number: 99-040-3705

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Customer Reviews

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Rated 5/5

Line DL4 MKII

I'm very impressed with this effect pedal. Tons of great reverb and delays to choose from. All effects can be custom tailored to your needs. Very solid when it comes to it's manufacturing. It's very quiet no noise or hiss. A truly great effects unit. I'm using it with my synths. I highly recommend it.
Music background: Producer/ Engineer
Rated 5/5

Taking the throne back soon enough

This pedal couldn't be any better!! I've been using it to gig for some days now and well enough can say that I'm very pleased with all the updates Line 6 has made. The reverbs on it are so awesome and unique. I'm yet to unleash the beast in it, with the increased looping time and added 15 delays; bet on being able to replicate many delays sounds out there in the market now and some. I'm sure you'll be seeing this pedal make a comeback.
Rated 4.5/5

Great update to the original

At the current price this is probably the best delay unit you can get. If I were budgeting for something in the $ range then I have some I like more than this one. I mainly got it because I used the original DL4 for the longest time, it was lost or stolen in a taxi cab in Bangkok and I just went without a large delay unit for the next ten years. I used the delay on the Eleven rack and individual analog delay pedals during that time. I got this one because I liked the original so much. Here are some pros and cons. Pros- you can get it to sound like pretty much any other delay with a little patience. For example I have a boss space echo delay and the cosmos on this is the space echo setting. I can get this to sound almost identical to the boss. Same goes for the Memory Man setting, the DM-2 and many others. Pro#2- you can mix in reverbs and they sound really unique and amazing. I like some of the reverb sounds on this more than some on the Boss RV-500 and some on the Bigsky. It has some really unique ambient reverbs that I've only ever heard in reverb plug-ins like unfiltered audio and Valhalla. Pro#3- you can use the unique effects built into the delays and reverbs to get other effect sounds out of the pedal. I have a memory man setting with a really fast delay time and the vibrato turned up. It sounds like a really nice vibrato effect. One of the reverbs has a nice pitch shifting effect, you can set up a preset to have octave down and octave up effects with just a tinge of reverb. So you are getting a lot of bang for your buck. The reason why I would never get rid of this pedal is because the classic dynamic delay is my most used delay and I haven't found another that functions as well for me. The heliosphere delay also stands out as an amazing ambient delayverb that I can't replicate with any of my other pedals. Cons are #1- the preset management is very clumsy and lacking in any sort of library management or software editing program. You must get a midi controller with this pedal otherwise you will get frustrated, even with the midi controller it's still frustrating. There is no sort of display and not a real good way to know which one of your 128 midi presets you are on, unless your midi controller tells you. You can't really move presets around and when making a new preset you have to go to your midi channel for that preset first, tweak it then save it and hope that it actually saved to your midi channel and not written over your initial A/B/ or C preset, as that sometimes happens. Knowing that the helix pedals have software for editing and preset management it's actually a little infuriating that Line 6 didn't make a similar program for this pedal, it wouldn't even have to be that complicated and wouldn't take much time or effort to have a basic editing and management program for this pedal. Line 6 can look at the Boss 500 series editing software as an example. One hack is to install Midistudio on your iPad if you have one, plug the iPad into the dl4 via usb, load up the program change template that has tabs with numbers for all 128 midi channels. Then you can quickly choose the midi channel you want to edit on, for example channel 12, make your edits and then save it. By default all the extra midi channels are on the original ping-pong delay. Some other things worthy of mention are that it does have true bypass, a nice way to mix the dry and wet signals like you would in a recording DAW (dry through and mixing in the wet), excellent studio quality stereo path delay and reverb. You just have to deep dive into the manual and spend a lot of time explore g the pedal to get the most out of it. Hope this is somewhat helpful. But for the price point this is selling for right now it's almost a steal, you're not going to find this level and variety of delay and reverb sounds in anything else for this price.
Rated 4.5/5

Great but not for everyone

You can get an insane amount of sounds with this thing and you would be hard pressed to find a pedal that can match its range of adjustment across the board. However, this isn't for the player that doesn't like tweaking sounds. The controls are anything but intuitive and most would find it hard to navigate without the cheat sheet. I happened to grow up with an original DL4 and am familiar with and love its weirdness. This is a great upgrade and it is incredibly well made.
Music background: Worship Lead Guitar
Rated 3.5/5

Very good unless you're the Edge...

I'm a huge fan and early adopter of the original and this new version.The 2 does everything better/lighter/smaller as advertised. Except that there is a known issue with subdivisions not. Example, you set a patch for playing U2 style repeats, if the song changes tempo and you tap a new tempo, the delay reverts to standard 1/4 repeats.
Line 6 says this will be fixed asap by a firmware update. I'm giving 3 1\2 star review until this is updated. Still a big fan but this oversight is disappointing to all of us that play live with human purcussion.
Music background: Dive bar superstar

Most of the guitarists here at Sweetwater remember well the first time we heard a Line 6 POD - that strange kidney-bean-shaped gadget that totally rocked the guitar world. As one of the world's largest Line 6 dealers, we've had a first-row seat to every groundbreaking release they've come out with. In fact, many of us gig out with Helix, their latest multi-effects pedal, or their modeling amps every week. What's more, Line 6 brings the same innovative approach to their live sound equipment that's made their guitar gear so popular. Whether you're looking for the perfect guitar rig to cover a wide range of styles or fantastically affordable digital wireless, ask your Sales Engineer about Line 6.

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