Waterproof frets, led display special waterproof frets, with amplifier waterproof frets, Hui Chi Pu Technology

Active fret comprising: a waterproof active frets, active indoor and outdoor water frets, active frets hotels, IP network cable active frets, active community frets, active station frets, square active frets background music broadcasting system, fire active frets, supermarkets active fret, fret active subway station; such as common (wall speakers, active wall speakers, frets, active frets, waterproof frets, Active waterproof frets, etc.) whose role is to convert electrical energy into corresponding audio sound energy and radiated into space to put it. For example, also is an active frets, waterproof frets, a very intuitive screen, which is rectangular in shape, is a perspective view of the so called frets, active frets are used in case of the absence of power amp device that and waterproof frets a truth, waterproof frets sound system of public broadcasting is a very important part, because it bears to convert electrical signals into acoustic signals for direct human ears listening. Waterproof frets power 50w 60w 70w 80w 120w frets install more than just a speaker cone angle in the housing, the sound column is more than just a speaker through permutations and the same phase connected together. Sound column directional characteristics in the horizontal direction and almost single speaker, but in the vertical direction is greatly improved. As it spread like a fan in a horizontal direction, but appear strong directional characteristics in the vertical direction, forming a thin much thicker near the "plate" like three-dimensional radiation effect. Phase column installed near the sound stage proscenium, this "sound plate" points the audience, with a strong beam of sound energy radiated to the back of the auditorium, the vertical distance between the front speakers due to different causes of each other weakened, in order to reduce the impact of high frequency comb effect sound effects, on the use of a plurality of closely spaced tweeter, with a minimum interval arranged in a line (20KHz ideal wavelength of 1.7cm, requires high-frequency or full-range speakers Center separated by less than 1.7cm, but the hearing range of the human ear can not easily achieve the desired 20-20000Hz, and the ear of the high frequency of the corresponding age became weaker, so it does not have to be so close, it should be based on the actual circumstances, of course arrangement as closely as possible); while the woofer bass Since longer wavelengths, you can use a little less of the speaker unit and the front panel evenly to fret, not too tightly packed to link wavelength.