Network Active Speaker section features: 4) audio transmission, control, monitoring how to resolve the speaker echo, only one CAT5 cable and RJ45 connectors, using the extremely easy to install. 5) the bass and treble are two separate class D amping. 6) with perfect protection function (short-circuit protection, overcurrent protection, over voltage protection, DC protection, power limiter, temperature limiter, clipping limiter). 7) K Series active loudspeakers are developing a network based on the power switch and automatic control technology for over 40 years achieved. Power switching technology provides high reliability, small size, low weight and high efficiency. As a high-frequency signal sampler to convert variable amplitude (sound) signal pulse width modulated converter work into the equivalent of a pulse signal output sound speakers, using high frequency conversion to obtain a high-performance sound. 8) Independent MCU control, can operate independently from the computer, you can independently control each receiver channel. 9) All setup parameters are stored in memory, you can update the firmware through RS232 port. 10) network transmission redundancy. Computer has no sound may issue four drivers: If you do not see a sound icon in the lower right corner, it may be a sound card driver is not installed, right-click "My Computer" and select "Properties" command, and then click the "Device Manager "tab speaker features and technologies, select the" View devices by type. " See if there is "Sound, video and game controllers" that was hit by an exclamation mark crossed, a note of your computer sound card is not the correct driver (or basically do not drive too), so be sure your computer is not sound, and how to do, find the original motherboard driver CD installation. Or look at the motherboard model to drive home one. How to choose the speaker _ Wuhan video equipment (certified) _ Speakers provided by Wuhan Engineering Co., Ltd. Jiuhua video. Video Jiuhua Wuhan Engineering Co., Ltd. (www.jowa-tech.com) is a leader in Wuhan, control and adjustment of the equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Jiuhua video in Wuhan leadership with the staff warmly welcome all inquiries negotiations to create video Jiuhua Wuhan better future.