XtoneboX is a boutique audio equipment manufacturer based in Vigo, Galicia, Spain. The company designs and handcrafts vintage-inspired gear across two main categories: hi-fi home audio (tube amplifiers, turntables, preamps, speakers) and guitar audio, with an emphasis on point-to-point wiring, tube circuits, and high-grade components.

On the guitar side, XtoneboX is known for a small lineup of handwired tube pedals. The Plexi Heritage is a preamp pedal that uses real tubes and high voltage to emulate the character of vintage Marshall Plexi amplifiers, while the Carbon Booster is a signal boost/drive pedal aimed at guitarists and bassists. The brand has also produced tube preamp pedals inspired by the Soldano Supercharger GTO circuit.

The company positions itself as a European boutique maker, emphasizing aesthetics alongside tone and offering worldwide shipping direct from Spain. Its catalog remains intentionally small, with each unit assembled by hand.

xtonebox has 1 product cataloged on Equipboard, including Boost Effects Pedals.