JBL GX-528 5.25" coaxial car speakers (sold in pairs) 5-1/4" 2-way speakers (pair) polypropylene Plus One woofer cone edge-driven soft dome tweeter grilles included handles up to 45 watts RMS (135 watts peak power) frequency response: 65-21,000 Hz impedance: 2.3 ohms sensitivity: 91 dB