We are absolutely loving the new Waza Craft series of pedals from Boss. They have managed to take quintessential effect pedals that have been part s of our arsenal for decades and given them new life and a stellar refinement in tone. The SD-1W has two modes – Standard and Custom. The Standard mode gives you the classic overdrive and light push that we love the SD-1 for, and the Custom mode changes the frequency response with a lot more low end and increased output. An overall excellent overdrive that would find a place on any pedalboard.