Pioneer TS-D10D2 D Series 10" subwoofer with dual 2-ohm voice coils + Infinity Primus
Amazon.com: Pioneer TS-A300D4 12 Inch 1500 Watts Max Power Dual 4-Ohm Voice Coil A Series Car Audio Stereo Subwoofer Loudspeakers / Free Alphasonik Earbuds : Electronics