Mark Holcomb

at 0:53 mark is seen sitting next to his PRS Archon head

In this video, we can see he's using a Gorilla GG-20 combo with a Boss MT-2

"The Seymour Duncan PowerStage 700 is the first power amp, in my experience, that's designed specifically for the guitar player"

"Immediately the first thing i noticed was that i had tons of flexibility, for instance, if i didn't like the way a room sounded, if it was sounding particularly dark or particularly bright i knew that i had the ability to just reach over and have an extra level of tweakability right at my fingertips, and i didn't have to go into my modeler and start tweaking amp settings or pedal settings, i could just go and start tweaking the settings on the 700"

In this Guitar Clinic video Mark shows he is using a MT15 for clinics instead of the Archon which he previously used and explains why.

In this past mark shows his travel rig. he uses the yamaha amp to practice while traveling

Mark Holcomb of Periphery used Zilla Cabs 2x12 Custom Cab as part of the band's setup before transitioning to Peavey cabinets, as detailed in Premier Guitar's "Rig Rundown: Periphery" by Steve Cook.

In this guitar playthrough of Sentient Glow, we can see Mark using a Peavey 5150 II Guitar Head in the background.

In this live performance, Jake Bowen, Misha Mansoor and Mark Holcomb all use Peavey 6505+ amps as power amps for their Axe-Fx II's.