Sony XS-W124ES (2 of these killer subs in a ported enclosure) 1000 watts of joy!
XS-W124ES 12" (30 cm) Mobile ES 4‑ohm Subwoofer *2,000 W peak / 500 W RMS power handling *Separated Notch Edge Surround for less distortion and clear sound *Five-beam Frame design disperses resonance *Dynamic Air Diffuser ensures efficient air circulation for smooth cone travel and cooling