The shape of the room in this case tends to be square, so the acoustic designers of SWD Group made it into equilateral trapezium. Advantages of such design are first of all to improve the standing waves of the low frequency in the square room. As corners of the wall are easy to assemble standing waves of low frequency, through changing the shape of this room, angles of the wall corners are adjusted to improve the interruption to hearing caused by standing waves. The second advantage is brought by the design of “Horn Mouth”, which help fix our sight onto the screen. Through such design, the interior acoustic problems are solved and the function of vision is strengthened simultaneously.