Mad Hatter Guitar Products is a Cave Creek, Arizona-based company founded by Ed Heisler, known as "Electric Ed," that specializes in solderless guitar electronics. The company was born from Heisler's frustration with repeatedly soldering and desoldering components while experimenting with different pickup and wiring configurations. Operating as the DBA of Goes to Eleven, Inc., Mad Hatter designs drop-in wiring systems that allow guitarists to swap pickups and change tone-shaping configurations without a soldering iron.

The company's flagship product line is the Terminator series of solderless wiring harnesses, available in configurations for virtually any pickup layout — from single-coil Strat-style setups to dual-humbucker and HSH arrangements. The Terminator Ten, designed for HSH-equipped guitars and inspired by a conversation with Steve Vai, uses a push-pull volume pot to switch between 500k and 250k ohm values, enabling coil-split options that effectively combine dual-humbucker and Strat tones in one instrument. Each Terminator system features custom CTS dual-value "Goes to Eleven" pots manufactured exclusively for Mad Hatter, along with Switchcraft output jacks and selector switches. The company also produces the Luminator system, the Electric Ed line of in-house wound pickups (including the 6/3 single coils, 7/2 Tele pickups, and 13/8 humbuckers), plus accessories such as picks, straps, and instrument cables with Neutrik connectors.