Sonance 92983 SONARRAY SR1 Outdoor Speaker System S4SAT (QTY 8): 3.5 (98mm) anodized aluminum cone & Santoprene surround S4SAT Dimensions: 6.5 L x 4.125 Dia. (165mm x 105mm)S8SUB (QTY 1):8 (203mm) dual voice coil, poly cone & Santoprene surround S8SUB Dimensions: 22 L x 15 Dia. (559mm x 381mm) System Impedance: 8 ohms per channel nominal Frequency Response: 40-20KHz +/- 3dB