The squawker unitRemove these four screws.Tweeters for high pitch soundWoofer for deep bassSquawkers for midrange/high toneSafety catch for lockSafety catch for lockPull the duct hole with a hand.Secure the screws firmly.Never try to move the tweeters.Rotate the squawkers 180 degrees so that they are installed to point outward.Factory set statusTweeters: Installed to point significantly outward.Squawkers: Installed to point a bit forward.Duct holeRotate the squawkers 90 degrees counterclockwise so that they are installed to point downward.Rotate the squawkers 90 degrees clockwise so that they are installed to point upward.