Rockford Fosgate Punch P1S4-12. 500W Max (250W RMS) 12" Punch P1 Series Single 4-Ohm Car Subwoofer. Rockford Fosgate P1G-12. Rockford Fosgate R750-1D, @4ohms. Rockford Fosgate. Rockford Fosgate R500X1D, @4ohms.
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