Narrow the wedge stance for a V-shaped, downward strike
For wedges the coach cues a narrower stance, 'outsides of feet to the outsides of shoulders,' with a little more weight posted on the lead side. He explains that a narrower stance makes the swing more V-shaped so you hit down past the ball, while a wider stance is more U-shaped; he compares it to a driver, where a wider stance with the ball forward helps you hit up without trying to.
Channel: PorzakGolf
Watch official source at 2:14