Boss MR50, 5.25" (13cm) Coaxial 2-Way Marine Speakers white, 75W RMS150W MAX Impedance: 4 ohms Frequency response: 120 - 18kHz, Sensitivity: 88dB @ 1W/1m, 30oz. Magnet, splash resistant, 1 inch mylar dome tweeter, 3/4inch aluminum voice coil, Incl. Grid and holder, Quantity: 1 pair, Depth: 2 1/4inch