What is the difference between 2.1 channel and 2.0 channel?

Upstairs answer copy party, despicable,, the owner of the Lord asked is the sound of the trolley, that is, the sale of singing and storage of electricity square dance of that type. \x0d\ Hello dear owner, \x0d\2.0 is two speakers, a left and a right, for the two crossover, 2.0 in all aspects of the sound field is very good, like the music performance, piano, ah, hosting a program, playing the guitar, singing, ah, singing and so on, must choose 2.0, the sound through a more translucent, there will be no muddled sound,,, 2.0 is suitable for listening to the music of the argument is so come on. \x0d\but 2.0 is expensive, low-end 2.0, bass is not strong, unless it is thousands of dollars, the bass will be done pure. Many people buy three or five hundred dollars of 2.0, listening to the bass comparison is very disappointing, feel less than two hundred dollars of 2.1 subwoofer. \x0d\2.1 is two speakers and then a subwoofer, 2 speakers main treble, bass focused to the subwoofer, 2.1 midrange resolution fuzzy.2.1 is a common home multimedia audio, the price is suitable for the bass prominence, especially in the quiet indoor playback sound quality can fully satisfy the listener, more than 200 yuan on the market for the 2.1 audio, bass, although heavy, but for the ears of the fussy people to listen to! Up is completely noise, not clean, on the four or five hundred dollars (four or five hundred dollars of 2.1 has been the best) sound much cleaner, 2.1 generally do not come with K song function, because there is no treble, even with K song, the sound is also distorted seriously, not suitable for K song. \x0d\ so the owner asked for the trolley, must be a category of singing or outdoor business, this category of audio are not 2.1, only 2.0, the sound quality is clear, far transmission, treble is not paste, so you have to buy a trolley then only 2.0.