CanJam at RMAF: High Resolution Technologies
HRT is known for their line of USB powered DACs. Using asynchronous USB transfer protocol to virtually eliminate jitter the three DAC products (Music Streamer II, $159; Music Streamer II+, $349; and Music Streamer Pro, $499) have been well received.
Recently added to the line is the iStreamer ($199) that acts as an external DAC for your iDevice, and has a high current charger that allows you to charge your iDevice while hooked up and playing ... yes, even your iPad.
Brand new is the HeadStreamer ($139) USB powered headphone amplifier. It uses the same asynchronous protocol as the other HRT products, and has an onboard digitally controlled analog volume attenuator that is adjusted from the computer.