5-1/4" 140W 2-Way Maximo Series Co-axial Car Audio Speakers Power Handling:. . 70W RMS. 140W Max Power. . General Features:. . Frequency Response: 55-20kHz. Impedance: 4 Ohms. Sensitivity: 89.5 dB. Copper Voice Coil Wire. High Grade Ferrite Magnet. Neodymium Tweeter. Mounting Depth: 2.2". .