Package Includes: (2) Memphis Audio SRX1040 10" SRX Car Subwoofer Audio Sub 400w Peak / 200w RMS 4 Ohm. Memphis Audio SRX1040 10" SRX Car Subwoofer Audio Sub 400w Peak / 200w RMS 4 Ohm. 12 AWG compression terminals. Anodized aluminum voice coil former. Optimized for both sealed and vented enclosures. Lightweight but rigid cone design for improved efficiency. Polypropylene cone for improved durability. Progressive poly cotton spider for controlled motion resulting in lower distortion. Rubber surround for improved durability Specifications: Size: 10". RMS Power: 200w. Peak Power: 400w. Voice Coil: Single. Impedance: 4-Ohm. Sensitivity (dB): 84. Magnet Size (Oz): 30. Mounting Depth (in): 4.65. Cut Out Diameter (in): 9.06. Voice Coil Diameter: 2". Warranty: 1 Whether it's your first system or you just need a little more bass in your trunk, the Street Reference line is the ultimate value subwoofer on the market. Redesigned from the ground up, SR subs are indistinguishable from their predecessors with improved performance, durability and cosmetics.