OPFXS is a boutique effects pedal company based in Santo Stefano di Magra, La Spezia, Italy. The brand grew out of OP Electronics, a DIY pedal venture launched in 2012, and was formally established in 2019 to manufacture and sell original designs. Operating from a converted industrial space that also houses Industrie Musicali, a family-run music center and rehearsal facility, OPFXS blends analog circuit design with digital control and programmability.

The company's lineup spans a wide range of effects categories. The Dig Deep sub-harmonic octaver tracks lower strings independently to generate a monophonic bass line without affecting upper-register playing, essentially letting a guitarist simulate a bass part. The Parallel Dimension is a fully analog chorus and vibrato built around a classic bucket-brigade device (BBD) delay line, while the Electric Vibe is an analog phaser and vibrato inspired by the Univibe circuit with extensive envelope controls. The Twin Boost pairs analog audio with digital control for a highly configurable clean boost.

OPFXS also pushes into programmable territory with the V-Uno and V-UNO X, compact reprogrammable pedals that can load effects from a growing library via USB, covering gain, modulation, synthesis, filtering, dynamics, and impulse response categories. Other models include the Asteroide sampler and harmonizer, the V-ZERO guitar synth, the Cometa envelope chorus/vibrato, and the Gain Box overdrive.