Boss MT-2 Metal Zone and Behringer UM300 Ultra Metal Mod

Mods for more thicker and compressed sound:

• Change the DO04 and DO03 to Germanium diodes, or use a switch to select the original Se diodes or the Ge diodes. I have used two 1n60 diodes.

See the picture:

*Use Boss schematic above to mod this Behringer stomp box.