The mid-high frequency section of most 3- and 4-way QSC screen channel loudspeakers has a pre-set downward tilt. When it is properly elevated to approximately 5/8 image height behind the screen and aimed to the last row in a typical stadium-style cinema, there is no need for additional downward tilt. This allows you to minimize the distance from the horn to the screen, and keep it flush within a baffle wall.
No Tilt Required
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This is an absolutely awesome design, including the special means of aiming the speaker for those rooms that need it.