THX Theater Basics 101

[ΑΝΔΡΕΑΣ Κ.]

Room and Layout

• Geometry that allows for a good image size, seating locations and reasonable distribution of room modes
• Controllable lighting system
• Decor that doesn't reduce image contrast or negatively affect color perception
• Seating away from the side and rear walls to prevent negative acoustical interactions
• Field of view for 16:9 image that's between 36 and 52 degrees, assuming multiple rows of seats

Environment

• Background noise less than NC-20 (that's ultra quiet) with all mechanical and presentation systems operational
• Control of room acoustics so reflections are inaudible
• Sufficient sound isolation, also below NC-20

Equipment

• Projection system with acoustically transparent screen
• Front speakers placement behind the screen
• THX-certified or approved equipment with sufficient output for the room size
• Four subwoofers minimum, at locations that provide uniform bass response
• Four surround channels minimum, for 7.1 capability
• Automation or simple-to-use remote

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