Browne Amplification Protein Dual Overdrive V4 - CopperMaker: Browne Amplification Model: Protein V4 Condition: New Description: Same soul. More control. All tone. Other overdrives wish they could stack like this. The Protein Dual Overdrive V4 is a collaboration between David Brown and guitarist producer Adam Sniegowski. After years on the road and in the studio using unpredictable backline amps, Adam approached Dave with a goal: create a dual overdrive that would sound great no matter what it was plugged