Ground FX is a boutique guitar effects pedal builder founded by Ben Laging, operating out of St. Pauli in Hamburg, Germany. The hand-built lineup leans toward heavier, distorted territory and draws heavily on vintage amp and fuzz circuits, with darkly stylized monochrome graphics tying the range together visually.

The catalog includes the Boneflower overdrive/booster, which uses an internal 18-volt circuit from a 9V supply, and the Burning Sunn, a preamp pedal voiced after the 1973 Sunn Model T. Higher-gain options include the Ravager distortion and the Koloss, a Big Muff-style fuzz, while the Aton delay/reverb and the Keto chorus/vibrato/reverb round out the modulation and time-based side of the lineup. The brand later expanded into guitar building under the Kodex Audio name, offering the Kodex electric guitar alongside the pedal range.

Ground FX has 4 products cataloged on Equipboard, including Overdrive Effects Pedals and Distortion Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Electronic and Rock. Notable users include FerrariLover.