Stringtheory SL is a Barcelona-based guitar hardware company that develops and sells precision-engineered guitar nuts and bridge pins designed to solve the long-standing intonation problem in fretted instruments. The company holds patents on adjustable nut systems that provide intonation calibration at the headstock end of the string — a complement to standard bridge saddle intonation that has traditionally been ignored. Their product range spans static calibrated nuts, dynamic multi-tuning systems, mechanical adjustable nuts, and calibrated replacement necks, using advanced engineering materials including PEEK, titanium, and stainless steel. Stringtheory operates both direct-to-consumer e-commerce and a B2B/OEM model targeting luthiers and guitar manufacturers.
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