Luohe where there is of campus broadcast monopoly | little knowledge Jiaming Yang 1503 +71780 +75 www.69139139.com 534 +64 +9528 Zheng * City Market Milan sun, Building 5, Unit 2, 2081, the Public Broadcasting System speaker selection: the principle depending on the environment chosen broadcast speakers of different varieties and specifications. For example, in Indoor Ceiling is appropriate embedded, no rear cover smallpox speakers. Such as the CH-705 Series. The structure of such speakers is simple, relatively cheap, and easy construction. The main drawback is the rear cover, susceptible to insects, rodents bite. Only a framework ceiling without ceiling room (such as open-frame mall), it is appropriate to lifting barrel speaker (ST-708S) or the rear cover smallpox speakers (XT-701N ~ 705 series). Since the ceiling the equivalent of an infinite baffle, so self-love ceiling rear cover speaker sound does not cause short-circuit. No ceiling, the situation is very different, if you are still using smallpox speaker without the rear cover, the effect will be poor. At this time lifting speakers principle. However, if too large investment, also available after cover smallpox speaker. A rear cover of the rear cover ceiling speaker not only general mechanical protection, but in certain extent, play the role to prevent acoustic short-circuit. Ceiling indoor (such as underground parking), you are advised to use the wall-mounted speakers or indoor frets. The former, such as BG-105, BG-106, BG-108 series, which as SN -302 ~ 304 series. In the outdoor, should use the outdoor frets or horn. The former, such as SY-510 to 540, SY-611 to 616 series: the latter as HS-30Q ~ 150Q series. Such frets and horn not only rain but also large volume, open outdoor environment, no reverb effect, it is necessary to select the larger volume of varieties. Garden, lawn, lawn speaker should be chosen. Such as the S-601 ~~ S-1001, KT-620, DT-21A ~ 28A series. Such Speaker rain, sleek, and the volume and sound quality are more meticulous. Jiaming Yang 1503 +71780 +75 www.69139139.com 534 +64 +9528 Milan sun, Zheng * City Market Building 5, Unit 2, 208