From the Source:
The mighty Angry Troll Linear Boost Amplifier from Way Huge Electronics serves up generous portions of volume and gain to pummel the input of your amp with up to +50dB of gain. It adds bite and punch while transforming your mild mannered tone into a beastly sonic onslaught! The Angry Troll's two controls interact like a vintage mic pre amp. The Anger knob-a rotary switch with six Fists of Fury positions-adjusts the amount of gain created by the Troll's op-amp, while the Volume knob regulates the overall output level. High grade components are used for a precisely tuned circuit that works like an extension of your amp. Another tone monster from the mind of Mr. Huge!