Shangqiu conference room audio Monopoly Zhengzhou leaving single speaker greatly extend the life of the choke ring, cloth side recapped ring, It is mostly used in a professional speaker, but is also useful in the civilian products, such as Nanjing production of 12-inch subwoofer YD315-8b is used cloth side choke ring. Cone Shangqiu conference room audio Monopoly Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209 cone speaker unit use to take the form of a variety of materials: Kevlar fiber weave basin, PP pots, mica polypropylene basin aluminum-magnesium alloy pots like the problem is not quite big, mainly paper-based or paper-based composite basin, due to the presence of the protein fiber, humid areas in the south almost inevitable mold erosion, that is our common moldy with white spots and make people headaches. Cone shown by the mellow sound, pure and honest much speaker factory favor. Such as the United States, "JBL" Denmark "Wafer" Norway "SEAS" produce a lot of paper-based or paper-based composite cone speaker unit, then how maintenance problems, especially for high gear horn care much enthusiasts attention. 3, meeting room audio monopoly Penjia Shangqiu Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209 Penjia wide range of color there are two kinds of materials, that is, thin metal stamping Penjia and the aluminum cone frame, of course, other materials, such as nylon the plastic basin rack (the AUPU 802 and Seattle H545) and are based on such Penjia. Imported and domestic high-end speaker unit is mostly aluminum cone frame, its high strength and superior seismic performance much better than ordinary stamping iron cone frame. However, small-caliber unit they do not matter. There are centering bracket (yellow plate) are produced through a special process cloth hemp products, as long as it does not unglued, nothing to say it. 4 magnet of Shangqiu meeting room audio Monopoly Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209 magnets need little maintenance, but when long there is loss of magnetic phenomena, but did not affect the overall performance, at most, is somewhat decreased sensitivity only minimal only, magnetically-shielded speakers than the average antimagnetic situation much better. Second, how to care for the speaker and the speaker unit, I tell you years of maintenance experience: 1, Box best selection of timber manufacturing, exterior paint with high wear resistance, high strength products better, but relatively rare; most of mechanism plate exterior wood paper or veneer with high density (appearance if not painted, it is recommended that the repainting N times). Placement should be in a dry room, as far as possible to avoid direct sunlight, do not on a wet surface, to prevent the mechanism of high-density board in case of tidal and Peng inflation, it would be in trouble. And speakers do not be shelved indefinitely without use of at least 1-3 times per month, more than one hour at a time, otherwise it will bring a lot of trouble, such as the static fatigue of the material, the divider in nonpolarized electrolytic capacitor leakage, etc. ranging from the impact of normal work, while affect its life. Of Shangqiu meeting room audio Monopoly Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209