Capable of pushing out sound levels that approach the edge of the infrasound spectrum, Devialet's Phantom speaker system finally reached the U.S. market last week. Two versions of the speakers will be available: the 740 watt, 99 db base model, the Phantom, will sell for $1,990; the 3,000 watt, 105 dB Phantom Silver will sell for $2,390. Devialet will begin fulfilling U.S. preorders this September.