The ratio of height, width and length of a room is very important. When a large set is combined in an ideal house, there will be a better Frequency Response Range during playback. In other words, the higher to lower frequencies that can be played by the combination can be played to the full, with high balance, and the standing wave situation is minimal. The degree of mutual interference between primary reflection and secondary reflection does not cause confusion. The combination of Fundamental and Harmonics can be perfect.

　　Acoustics is an almost elusive and unpredictable science. Over the years, acoustic experts have tried hard to find the most ideal ratio, which is the "golden ratio" in the mouth of enthusiasts. Experts have different opinions about the "golden ratio". One of the more inclined ones is 0.618:1:1:10618, which is 8 feet high, 13 feet wide, 21 feet long, and a space volume of 2,184 square feet.

　　 0.618:1:1.618 This ratio is the oldest legend, derived from Leonardo Fibonacci. He went to Egypt in the twelfth century to take the secrets of pyramid construction. He got a digital ratio of 1:0.618. Three hundred years later, the mathematician LUCAS PACIOL studied in depth. In the end it became one of the many doctrines of acoustics, namely 0.618:1:1.618.