PS-30,PS40 BST(Balanced Sound Technology)

PS-30,PS40 BST Sound Technology)

Patent in Korea

The role of sound tube (sound pipe) in BST earhpone.

It reproduces wider sound bandwidth by faciliating the passage of the high-sound and wuppress that of the low sound.

It protect your ear health when you are listening by allowing air naturally flow in the interior of the earphone and your ear.