HED 12 DVC 4 1200W MAX 250W RMS1200W MAX 250W RMS DVC 4ohmStamped Steel Slim Mount Frame With Encapsulated MotorVented Motor Structure For Optimal Thermal Heat DissipationPoly Cotton Spider With Spaced Woven In Tinsel WiresOversized Parabolic Dustcap For Extreme RigidityUnimount Gasket Surround Family