Dual 10''Indoor/Outdoor Compact Subwoofer The Control SB210 provides low frequency reinforcement for a wide variety of applications. Its compact size, high output and outdoor capable design makes it one of the most versatile subwoofers in the installation market. 2 x 250 mm (10 in.) Aluminum/Ceramic Composite Cone Drivers, 42 Hz to 200 Hz frequency range (-10 dB), 400 watts continuous pink noise power capacity (IEC-shaped pink noise for 100 hours), 95 dB sensitivity (1W/1m) in half-space 8 ohms nominal impedance, IEC 529 IP-X5 rating. Exceeds MilSpec 810 for humidity, salt spray, temperature & UV, AV Shielded, SonicGuard? Overload Protection, Dimensions (HxWxD): 355 mm x 590 mm x 570 mm (14 in x 23.3 in x 25.5 in), Net Weight: 17.1 kg (38 lbs.)