Number 2 binary frequency trapezoidal symmetrical design, white box body iron net unreal colour collocation let indoor space more attractive to modern, small, delicate, dreamy with indoor environment as a whole. More hanging design easier to various kinds of design and installation. The bass unit bubble edge bass unit, bass, intermediate frequency plump and strong, high using one inch silk membrane treble. Double magnetic design load power is greater, the high-frequency exquisite. Clear, round and bright, can satisfy all kinds of meetings, and multi-function teaching, press releases, background music, etc.