PIEZO HORN TWEETER, 85 x 85 mm Special piezo high impedance tweeter featuring high efficiency without loading the amplifier too much. Can be connected easily via a small series resistance without special filter. Crisp, clean reproduction of the high frequencies. Power max.150W Frequency response 4kHz - 30kHz Impedance : 1kHz1k ohms Impedance : 25kHz60 - 80 ohms