Tone Bender MKIV by D*A*M

The Tone Bender MKIV by DAM by Sola Sound is a vintage fuzz pedal with specific technical specifications. The pedal was released in the 1970s and was regularly advertised in Beat Instrumental & Melody Maker publications. The earliest versions of the Tone Bender MKIV were housed in grey, pressed steel enclosures with "bendy" or "spaghetti" graphics. Later versions came in yellow and orange color schemes and featured the "Batman" logo with a grey color scheme.

The circuitry of the Tone Bender MKIV evolved over the course of production. The early models featured a three-transistor circuit loosely based on the Baldwin-Burns Buzzaround, while the later models built in the late 1970s utilized a silicon-transistor fuzz circuit loosely based on the Electro Harmonix Big Muff Pi. The pedal was discontinued in the late 1970s.

The "Brazilian" version of the Tone Bender MKIV, built by DAM, features the Texas Instruments 2G375 and two Mullard OC82D green jackets. The pedal is known for its amazing transistor setup and is considered one of the finest versions of this pedal available.