For those dissatisfied with the level of sonic quality available from CDs or digital music formats, the new PS Audio PerfectWave DirectStream digital-to-analog converter (DAC) provides a state-of-the-art solution. PS Audio’s philosophy of circuit design focuses on employing recent and emerging technologies to serve the ears of increasingly demanding audiophiles. With that in mind, the Boulder, Colo., company is allowing owners of its standard PerfectWave DAC to update their units to include the DirectStream te…