MB Quart Z-Line Series 6.5" Component Set and X-line 6.5" Coaxial speaker bundle ZC1-216 - MB Quart 6.5" 240W RMS Z-Line Series Component Speakers System Z-line Power Handling: Peak: 240 watts per set / 120 watts each side RMS: 120 watts per set / 60 watts each side Recommended Minimum Power: 60 watts RMS each X-Line power handling 160 Watts Max, 80 Watts RMS 4 Ohms Impedance