Rockford Fosgate, division of Rockford Corporation, is a world leader in the design and manufacturing of high-end automobile sound equipment.

Sensitivity: 81 dB
RMS Power Range : 150-800 Watts
Peak Power Handling: 1600 Watts
Impedance: Dual 4 Ohm
Low Frequency response: 20 Hz
High Frequency Response: 200 Hz
Diameter: 10 Inch

Features 
aluminum parabolic woofer cone 
rubber surround 
cast aluminum basket 
dual 4-ohm voice coils 
bottom-mount depth 8-3/16" 
ported box volume 1.25-2.0 cubic feet 
Priced per speaker 
Subwoofers are usually come as a single speaker unless noted differently.