Needn't amplify by Amplifier -- Gaeml's Big Song
Gaeml‘s Song originated in the Spring and Autumn Period in China, has been 2500 years of history, which is a multi-part in the Gaeml region in China , no command, a cappella, folk choral form natural chorus. In 1986, at the Paris Autumn Festival, once the Gaeml‘s Song from Liping of Guizhou Province appeared, was sensational and considered a "spring-like flash of music, passing the edge of the ancient dream of melody."
Needn't be amplified by any amplifiers, you can enjoy pure human songs from these beautiful girls...