Rubber Air Suspension Woofer4-Inch Woofer/2-Inch Mid/1-Inch Tweeter 400 Watts Peak Power Ferro Fluid Enhanced Voice Coils Aluminum Die Cast Cabinet Frequency Response: 80-20kHz SPL: 94dB4 Ohm Impedance Complete Mounting Kit & Wires Dimensions: 41/4-Inch H x 73/8-Inch W x 41/4-Inch D