The "i" series System follows the principle of concision and beauty of iPod design. Which can make a set of individually exquisitely audio system with portable audio source from iPod expediently. "i" series line products is pre amplified with vacuum tube, To better MP3 sound quality by utilizing vacuum tube, the sound is incisively and vividly when listening to it. It is easy to control it by remote control. It can be used in small and medium-sized listening space such as bedroom, office or Den and so on. At the same time, the products obtain the award of china industry design in 2005 and the products type includes: i2, i5 and iR201.