FS 2- Rockford Fosgate HX2 10\" subs Size 10 inch Voice coil Configuration - Dual Material - Aluminum Description - 3" 4-Layer Cone Material Paper Description - FIBERlock Frame Material Frame - Cast Material - Aluminum Surround Material Rubber Description - Santoprene BART Spider Crossover Specifications Power handling (RMS) - 500 Watts Power handling (Peak) - 1000 Watts Impedance - 4 Ohms Sensitivity - 85 Vas (qFt) - .99 Fs - 30 Qts - .40 Xmax (mm) - 13.97 Dimensions Depth Bottom mount - 5.4375 in. Cutout - 9.3125 in. Displacement - 207.36 cu in. Enclosure Sealed box - Recommended volume (Cubic Feet) - 0.75 Recommended volume (Liters) - 21.24 Ported box - Recommended volume (Cubic Feet) - 1.00 Recommended volume (Liters) - 28.32 They are used and have a bandpass box to go with them if you want it. $200.00 + shipping. These are the only way to hear bass over a 427 with almost open headers. If you build it, the mud will fly! 72 K5 blazer with a 427 tall deck and TH350/NP205 and 9"of lift with 40"tires.