Filter Filters $100-$500 Rockford Fosgate Remove All Filters Condition New (4) Size 12" (2) 10" (1) Voice Coils Dual (2) Single (1) Sensitivity 81-85 dB (1) 86-90 dB (1) Receiver Size Yes 10-7-2015 (2) Rockford Fosgate R2SD4-12 12" Prime R2 4-Ohm DVC Shallow Subwoofer $159.99 Rockford Fosgate R2D4-12 12" Prime R2 4-Ohm DVC Subwoofer Car Audio Sub Speaker $104.99 Rockford Fosgate P1S4-10 Punch 10-Inch P1 4-Ohm 250-Watt RMS Linear Spider... $109.95 Rockford Fosgate R2-250X1 Car Audio Mono Prime Sub Amplifier 250W Subwoofer Amp $219.95