Founded in 1997 by Tim Brennan in Brisbane, Australia, Tym Guitars is a one-person operation specializing in handmade custom guitars, effects pedals, amplifiers, and speaker cabinets. Brennan — who adopted the name "Tym" as a brand name and is now universally known by it — builds everything by hand from a workshop in inner south Brisbane. His guitars draw heavily from 1950s and 1960s designs, with the Wosrite series (inspired by Mosrite Ventures models), the Vibratone series, and the TMI series among his original designs. He has also produced signature models, including a limited-run guitar designed with Nick Royale of The Hellacopters and a Johnny Ramone-inspired model reflecting his deep connection to punk rock.

Tym's handmade effects pedals are equally well regarded, particularly the Big Mud line — a family of Big Muff variants including the Rams Head, Triangle, Civil War, Op Amp, Violet Rams Head, and Red Mud editions, each replicating a different era of the classic circuit. His Buzzrite pedals are faithful reproductions of the 1960s Mosrite Fuzzrite, available in standard and deluxe versions with NOS transistors. All pedals are built using locally sourced components where possible and housed in custom stainless steel enclosures.

Beyond building gear, Tym Guitars operates as a curated vintage instrument dealer, guitar repair and restoration shop, and runs Tym Records, a vinyl-only independent label releasing punk, psych, and underground music. The business operated physical retail locations in Brisbane for over two decades before transitioning to online-only sales, though the workshop continues to produce instruments, pedals, and repairs with worldwide shipping.

Tym Guitars has 39 products cataloged on Equipboard, including Fuzz Effects Pedals, Overdrive Effects Pedals, and Boost Effects Pedals. Their gear is featured by 14 artists, with the strongest followings in Rock, Pop, and Folk, World, & Country. Notable users include J Mascis, Bob Mould, and Brian Cook.