It is no longer rare to see line arrays used in concert halls. It is true that the sound system used in all performances has changed to line arrays, leading to tremendous advancements in performance and scale.
 

The emergence of line arrays began with the chronic problems of existing point array speakers.
The problems with speaker systems used from 1970 to 2000 were always in the array. It was impossible to solve the problems that occurred when arranging numerous speakers. It is a common phenomenon that the more sound sources there are, the more troubles there are. However, in order to cover the role of a system that must cover tens of thousands of audiences, numerous speakers were arrayed left and right and up and down, but the reality was that there was always a shortage.
With the emergence of line arrays, the problem of horizontal arrays disappeared for the time being because there was no left and right array. This was a revolutionary advancement and a great improvement. From now on, it seems that we only need to complete the vertical array. System designers design 3-way and 4-way line arrays to achieve the performance that the market wants. However, it is difficult for such a system to perfectly satisfy the formula of the line array. This is because there are physical limitations of the speaker units we use. There are many restrictions on arranging the units. They must be placed in one enclosure and configured, and a very close array must be created, and at the same time, the problem of how to make a point source into a line source in the high-frequency band of 1.2 kHz or more, which has a very short wavelength, is bound to be a very big challenge.

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The waveguide is one of the key elements in a line array speaker. The problem of how to make the sound coming from the 38mm diameter compression driver come out at the same time from the opening where the sound is coming out in the form of a plane must be solved. The next problem is the placement of the units. Another key point in a line array speaker is the spacing between the arrayed units. The enclosure must be designed to satisfy this advantage. Once the components of the line array are completed with one enclosure, a rigging suspension is required to allow them to be combined. This part is particularly problematic in terms of how to easily connect the enclosure while satisfying the conditions of the line array in an external field.