“The Amp Eleven is an overdrive similar to the Ibanez TS-9 or perhaps a Timmy with the builder’s own touch. Some may not care for the boutique aspect
of this tone monster, but the Amp Eleven is a straight ahead musical pedal that
drives a clean amp to sweet tones at low volume. Pedal has
controls for bass and tone with the addition of a switch for boost to push a
lead over the top.”
More information on this effect can be found here.