Line6 DM4 mods, anyone.?

Googled it for ya! //www.google.com/amp/s/www.trueguitarist.com/line-6-double-preset-mod/amp/

 

It references some older articles plus also YouTube vids. Any luck on the tube?

 

I'm seeing a lot of stuff on Google including wiring diagrams. Is this a hijacking of the expression input, adding a new small circuit board or something else?

 

So I did the dual preset mod and quick access looper switch to my DL4. I remember seeing a few variations on how to do it but I ended up getting a PCB that allowed for dotted 8th notes (wouldn’t apply to your DM4). Got the PCB from here: EDIT2- realized I put the wrong link at first- here’s the PCB:
Line 6 DL4 Dotted Eighth/Double Preset Mod Kit

Jump to looper I found here if you were wondering:
Line 6 DL4 Mods | Looper Switch DL4 Mod | Pedal Haven


The jist of the dual preset mod was using a 10k pot OR a 10K resistor(you’d want that) and bridging the expression output. The dual mod came from the fact that you could have 2 variations on 1 preset and morph between the 2 with the expression pedal. You’ll install a stomp switch with a 10k pot in one side so it’s instant toe down.

I did a built in expression first with a 10k pot drilled through the side (so I could morph) then when I added the dotted 8th I installed a SPST switch so I could choose my added pot expression or straight A/B.

You’d want to do a DPDT switch (edit: a 3DPDT to have an LED) with a 10k resistor so that when it’s engaged it’s toe down and when it’s not it’s toe up. There is a crappy schematic that also shows how to pull 9v from the pedal +resistor to engage an LED so you know if you are A or B. No battery needed. I used the one with Abe Lincoln’s head:
ilovefuzz.com • View topic - DL-4 double preset mod?

I did this to my DL4 and my friends DL4 along with replacing the stock PCB mounted switches for normal ones. Was a fun weekend project, kind of funny I ended up getting an M9 a month or so later. Need to post it on Reverb or something.