Package includes following products: – Ground Zero GZUK 165SQ – Ground Zero GZUT 28SQ Diameter 165 mm / 6.50″ Power Handling (RMS/max.) 140 / 230 Watts Impedance 4 Ohms Efficiency 89 dB Frequency Response 40 Hz – 25 kHz Tweeter GZUT 28SQ Outside Ø 54 mm / 2.13″ Midwoofer GZUK 165SQ Lautsprecher Durchmesser 165 mm / 6.5″ Mounting Ø 144 mm / 5.67″ Mounting Depth 63 mm / 2.48″.