OEM Systems IO-510-B 5-1/4 2-way Cabinet Loudspeaker Pair Type: Indoor/Outdoor Speakers Power Rating: 50 watts nom. 100 max. Frequency Response: 42 Hz - 21,000 Hz Nominal Impedance: 8 Ohms Sensitivity: 90 dB Dimensions & Weight: 7-1/4 W x 10 H x 7-1/2 D, Mounting bracket increases depth by 3/4 Net Weight: 5.25 lbs. each