When Luis Etscheid and Caleb Henning launched their boutique effects-pedal company, Mantic Conceptual, in spring 2013, they had a great deal more curiosity than experience. Fortunately, the Denver-based musicians are pretty good at experimentation, and in their first year, they found an impressive list of clients. Etscheid sent Adrian Belew, formerly of King Crimson and Nine Inch Nails, the Master Flex synth-fuzz pedal, and Belew started using it at shows. Ikey Owens of Jack White's touring band had Mantic build him a custom delay called the Isaiah. And Ed Rodriguez of Deerhoof used the Proverb reverb pedal during his last tour.