Amazon: Rockford Fosgate R2 Ultra Shallow 10-Inch 4 I purchased the Rockford Fosgate R500X1D Prime 1-Channel Class D Amplifier and paired it with 2 of Rockford Fosgate R2 Ultra Shallow 10-Inch 4 Ohm DVC Subwoofer. I did this based upon someone else's review that was left. I am glad I did. The base is unbelievable and I added a crossover control and mounted it by drivers seat to control the bass.
Related with 4 channel alpine amplifier wiring diagram