The Boss MT-2 Metal Zone Distortion w/ Keeley Mod is the heaviest modification ever produced by the company, combining an armada of component improvements for low noise, improved harmonics, and a triple threat of diode options for an army of metal in a single box.
- Interface: Level, Distortion knobs, High/Low and Mid/Mid Freq dual-control knobs
- Modifications: Three-way diode switch (Standard, Tri-Diode, Ultra Tube), blue LED, metal film/poly capacitors