SOLD INDIVIDUALLY...Driver Complement: Three 4-1/2 inch (11.4 cm) BDSS High-output drivers with coincident array 1 inch (25 mm) ferro-magnetic fluid damped pure aluminum dome tweeter. Two 4-1/2 inch (11.4 cm) BDSS High-output full-range drivers. Four 3-1/4 inch (8.3 cm) full-range high-output surround drivers with butyl rubber surrounds. Frequency Response: 50 Hz Ð 30 kHz Nominal Impedance: 8 Ohms Rec. Assoc. Amplification: 20 Ð 200 Watts/channel Sensitivity: 90 dB Dimensions: (speaker only, not including bracket) 46-1/4 W x 4-1/4 D x 5-3/8 H inches (117.48 cm W x 10.48 cm D x 13.65 cm H) Weight: 31 lbs. (14.06 kG)