Devin Holt is all orange, all the time. As you can see above, he’s running two versions of the popular Orange Rockerverb series—the Mk II on the left provides additional clarity and about 25 percent of his tone while the Mk III on the right runs all the modulation effects and handles about 75 percent of the power. He prefers the dirt from the Mk III version because Holt thinks it’s bigger and thicker. (All his dirt is coming from pushing those glowing EL34 tubes.) The Mk III goes through a 4x12 and 2x12. The 4x12 has various Celestions while the 2x12 has Jensen Electric Lighting speakers. The Mk II goes through a 2x12 loaded with Eminence Governors.