The Achtung Funkmeister (AF-2) is a volume control that's built like a tank and may be the only part of your rig that could survive an EMP blast (electromagnetic pulse commonly associated with detonation of a thermonuclear weapon). The AF-2 can be used to provide a volume control anywhere in your signal chain from your pedal board to your amplifier's effects loop, but it was specially designed to provide an additional volume control to tame the Fender Hot Rod Deluxe and Blues Deluxe amplifiers (or any other tube amp using a serial effects loop).
 
The guitar input jack is on the left and the output is on the right. This arrangement is backwards to most UDV pedals, but it was done intentionally to line up with the pre-amp out on the Hot Rod Deluxe amplifier.
 
The AF-2 allows you to play at practice levels and dial in the perfect volume to keep that tube amp sparkle. This also eliminates the annoyance of going from no volume with the knob at zero, to eardrums busting loud at 2, making it very hard to adjust your tube amp at lower stage volumes or in practice. The AF-2 plugs into the amp's serial effects loop and instantly solves this problem. Don't buy a toneless (and joyless) practice amp to get lower bedroom volumes, the AF-2 solves the powerful tube amp volume dilemma and allows you to use your effects loop.
 
The large volume knob with scale allows you to dial in the volume where you want it. The pedal's name is inspired by the U2 album (Achtung Baby). Achtung is German for "Attention" or "Danger", and Funkmeister translates to "radio master (operator)". The design inspiration for the AF-2 comes from an old US military radio called the AN GRR-5, better known as the ANGRY-FIVE. The ghost graphic is the unofficial unit patch for the US Army 23rd Headquarters "ghost army". Through the use of misinformation, deception, and dummy tanks the ghost army fooled German forces and disguised the timing and location of the Allied invasion of western Europe prior to operation Overlord. UDV logo and graphic design are copyright of UDV Pedals LLC.