Wyn Guitars is a boutique bass builder based in Woodland Hills, California, founded in 2006 by Randall Wyn Fullmer. Before starting the company, Fullmer spent 18 years at Walt Disney Feature Animation, where he worked as a producer on films including Fantasia 2000 and The Emperor's New Groove before leaving the studio to build instruments full time.

Despite the Wyn Guitars name, the company focuses almost exclusively on high-end custom electric basses, including four-, five-, and six-string models in bolt-on, neck-through, single-cut, and dual-cut configurations. Builds are typically one-off commissions featuring exotic tonewoods, hand-shaped necks, and Aguilar electronics, and the shop produces a small number of instruments per year.

Wyn basses have been played by a number of well-known session and touring bassists, including Jimmy Haslip, Abraham Laboriel, and James LoMenzo. The brand has a small but dedicated following in the boutique bass community, with instruments regularly discussed on TalkBass and sold through specialist dealers such as The Low End.

Wyn has 2 products cataloged on Equipboard, including Electric Basses and Fretless Basses. Their gear is featured by 2 artists, with the strongest followings in Rock, Electronic, and Funk / Soul. Notable users include Jimmy Haslip and Robin Zielhorst.