Oberon is a germanium transistor based treble booster à la Rangemaster. At its heart is a NOS PNP germanium transistor that is carefully measured for leakage and gain which is then biased correctly to get optimal performance. It's really simple to use with just 1 knob for Boost and a 3 position toggle switch to choose which range of frequencies are included in the boost. High will cut most mids and lows, Mid will cut most lows and Low will give a full range boost. You can dial back on the punch of the pedal with either you guitar's volume knob or the internal gain trim pot to "set it and forget it."
Demo by Question Son (EN)
Official Product Video (EN)