The Double Rock! Vexter distortion guitar pedal is an affordable silk-screened version of ZVEX's handpainted Double Rock!. There is a notable origin story to the Double Rock. Legendary guitar great J Mascis is a fan of ZVEX Effects, and their Box Of Rock in particular. He asked them to build him a dual pedal using two of their Box Of Rock circuits. He wanted one to cascade into the other. So they built him a custom, oversized "double" Box Of Rock. They liked the result so much, that they added some features, shrunk it down and turned it into a commercial product. The Vexter Double Rock is a veritable Swiss Army knife of classic British-style crunch, paired with boost, in a compact ZVEX format. Either channel can be distortion, or boost. This yields four different gain staging schemes, each with useful applications for stage and studio.