Logan Cooley, Nick Bjugstad and Liam O'Brien each had a goal and an assist, and Michael Carcone had two assists for Arizona (4-5-0). Karel Vejmelka made 20 saves.
Pavel Mintyukov scored, and Alex Stalock allowed seven goals on 21 shots for Anaheim (4-4-0).
Dumba gave the Coyotes a 1-0 lead at 18:58 of the first period.
Sean Durzi scored 50 seconds into the second period to make it 2-0, and O'Brien pushed it to 3-0 at 3:54.
Jack McBain made it 4-0 at 7:37.
Cooley converted a penalty shot at 16:19 to extend the lead to 5-0. It was his fourth goal of the preseason.
Bjugstad made it 6-0 at 6:41 of the third period.
Mintyukov scored a power-play goal for the Ducks to make it 6-1 at 9:43.
Lawson Crouse scored a power-play at 16:11 for the 7-1 final.
