BJFe Model R 5K

BJFe Model R (MR5K) - Bjorn's take on the infamous Trainwreck amps of the late great Ken Fischer. 

The MR runs on a 9V battery or a standard 2.1mm barrel type center minus DC9V adapter. When the supply voltage drops, the tone becomes muffled and the LED becomes darker. In that case, replace the battery or check the connected adapter.