Ground Zero URANIUM GZUC 165.3SQ

Diameter165 mm / 6.50?? Impedance4 Ohms Efficiency89 dB Frequency Response40 Hz ? 25 kHz TweeterGZUT 28SQ Outer diameter54 mm / 2.13?? Midrange SpeakerGZUM 55SQ High performance midwooferGZUK 165SQ Speaker Diameter165 mm / 6.5?? Mounting diameter144 mm / 5.67?? Mounting depth63 mm / 2.48?? CrossoverVariable 3-way Crossover frequency450 / 4500 Hz