1. Built-in 70v/100v 100% copper transformer. The 70v/100v transformer technique reduces line losses on longer distance and allows easy parallel connection of multiple loudspeakers 2. Adopt brand new 100% high grade material metal grille and ABS enclosure +aluminum mesh cover + 100% copper transformer -
3. Long-term durability, never out of shape and fading; high sensitivity, clear and sonorous sound.