Infinity will please the custom install crowd, as well as consumers who are constantly repositioning their subwoofers in search of that perfect location, with the first wireless subwoofer we've seen. No, it's not battery-powered, but the PS212W ($679) requires no signal link to the receiver or pre-pro. It incorporates a 400W amp and a 12" Metal Matrix Diaphragm driver. The wireless banner tastefully emblazoned across the grille does not come standard.