Larry DiMarzio introduced the Super Distortion and Dual Sound pickups around 1971. These were the first mass market replacement guitar pickups and started a revolution of guitar hot-rodding in the 1970s. The high output Super Distortion pickup made it easier to get an overdriven distorted sound than with most stock humbuckers of the period. Located in Staten Island DiMarzio now produces a range of nearly 200 different pickups, as well as cables & straps.
Source: DiMarzio website (18 March 2017)