The stock was the solution. It was thick enough to handle the torque of the "Roller Lap" platter system (invented for IMAX) but flexible enough to not crack in cold projection booths.
IMAX technology uses a daily automated microphone calibration protocol. The system samples ambient room acoustics and adjusts digital equalizer parameters every morning. This process compensates for changing humidity levels and seating absorption properties inside the room. Premium Tier Seating Economy imax 06