This is a three-wire connection terminals, three wires are positive, negative and shield. Between the front and rear preamp XLR preamp is called "balanced terminal" and "microphone plug" terminal, in general application in the field of professional radio or television, but in some of the more top home audio equipment is also used to, signal transmission. Advantages balanced XLR terminals that transmit signals terminal linear model, which can greatly reduce the electromagnetic, radio frequency interference with electronic systems at work at the time of long-distance transmission of the audio signal and the noise and hum and terminals generated in the audio signal is fundamentally different . Terminal box is a transit line construction of branch lines to the table live insulated terminals provide an interface device for convenient wiring and check line. In some cases, for ease of construction and commissioning can be some of the more specific and more regular installation setting products such as short-circuit isolator like terminals mounted box. Terminal Design | Song Chong-wook Electronic Products Factory (certified) | Shaoguan terminal by Dongguan Shijie Xu Song Chong electronic products factory provided. Dongguan Shijie Xu Song Chong Electronic Products Factory (chuangxs.1688.com) (www.chuangxs.1688.com) is Dongguan, connectors leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Song Chong-wook in electronic products plant leadership with the staff warmly welcome all inquiries negotiations to create electronic products factory Song Chong-wook a better future. You can also access (www.chuangxs.1688.com/supply_details_33447680.html), for more information about the company.