The external sound column is a high-power waterproof sound column that operates 24/7, with a long sound transmission distance. It is a full band speaker that is clear and transparent, made of aluminum magnesium alloy material. Durable and sturdy, with a beautiful appearance and easy installation. Can withstand long-term wind, rain, sun, frost, and snow. Suitable for all-weather outdoor use, such as indoor and outdoor use in public places such as schools, squares, parks, stations, wholesale markets, etc.

The installation mainly adopts wall mounted installation, determine the hanging position indoors and outdoors, and hang the sound column on the wall by tightening the screws. The wiring needs to be connected to COM and 100V wires or COM and 70V wires (do not directly connect 70V and 100V wires to avoid damaging the sound column transformer).

A sound column is composed of multiple speakers arranged and connected in phase. The directional characteristics of the sound column are similar to those of a single speaker in the horizontal direction, but there is a significant improvement in the vertical direction. It spreads out like a fan in the horizontal direction, but exhibits strong directional characteristics in the vertical direction, forming a nearly thin and far thick "plate" shaped three-dimensional radiation effect. Install the sound column near the stage entrance, point this "sound disc" towards the audience, and the sound beam radiates strong sound energy to the back row of the audience hall. The front row weakens each other due to the phase difference caused by the vertical distance of the speakers, which may result in lower sound pressure than a single speaker at this location. This makes the direct sound distribution of the sound field more uniform.

The common types of computer speakers on the market now are mainly plastic and wooden. Two different materials have their own advantages. The advantage of plastic is that it is easy to process, the appearance can be made more attractive, and it can be produced at a very low cost in large-scale production. But it doesn't mean that plastic is synonymous with low-end. Some well-known foreign brands also use plastic materials in their high-end products, which can produce good sound. However, domestic manufacturers still have ideal indicators such as density and processing technology of plastic materials, and generally use plastic boxes for mid to low end products.