This article introduces a speaker designed according to the "full-color audio-visual" technology. The low-mid-tone unit is tilted upwards to a certain angle, making full use of the reflected sound to create a strong sense of presence and a wide sound field.
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The structure of the cabinet is as follows. There are two types of floor box and bookshelf. When making the picture, the internal structure and size of the box should be strictly guaranteed. In addition, pay special attention to the following points: 
1. Reinforcement of the box slope
Using the method of woodworking bite, first bite the mouth and then push it into a 30 and 60 degree angle with a plane, and then add reinforcement with a strip.
2. Reverse hole
With a 50.8MM steel pipe, the inner wall is made into a 55MM diameter and the length is cut into 87MM.
3. Sound absorption processing
30mm thick fiber cotton is used as a sound absorbing material in the box, and the two speakers do not need 0.5 kg of fiber cotton.
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