In our last Rig Rundown with Mahoney in 2009, he was using two Diamond Spitfire heads for his clean-dirty tone equation, but has since dusted off two studio veterans and brought them out on the road—a Bogner Überschall and a Mesa/Boogie Mark V. Both heads crank out of their own Diamond Custom 4x12 that are loaded with Celestion Vintage 30s.






















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![Rig Rundown: Russian Circles’ Mike Sullivan [2025]](https://www.premierguitar.com/media-library/youtube.jpg?id=62303631&width=1245&height=700&quality=70&coordinates=0%2C0%2C0%2C0)


























