Not sure about what he is using in the rack at the moment but I am pretty sure he used to use a Roland SP-404 for the backing tracks.
Good eye Mmodeen, thank you! I'm preparing for live shows and so curious how they approached the challenge. Those guys carry some serious gear! Alas they are 4 guys, I am trying to go as light as possible for my solo performance. You might dig this, last week I scored a TC Helicon Mic Mechanic 2, maybe very similiar to what he has there on the TC Rack, https://www.tc-helicon.com/search/Tchel ... mechanic+2
I bought the Mod Tone Power Plant to power it and a couple other pedals https://www.modtone.net/power-plant-13.html
, sounds like it will help the gear adapt to whatever power comes at it, and most importantly, cleanly. There are 7 DC and a 9-12v AC input(i read someone successfully daisy chain 2 on). Thank you again for sharing your sharp eye!