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Music Streamer II+

Retail Price: $349.95

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High Resolution Technologies - HRT - Music Streamer II+ USB DAC

High Resolution Technologies - HRT - Music Streamer II+ USB DAC
High Resolution Technologies - HRT - Music Streamer II+ USB DAC High Resolution Technologies - HRT - Music Streamer II+ USB DAC High Resolution Technologies - HRT - Music Streamer II+ USB DAC High Resolution Technologies - HRT - Music Streamer II+ USB DAC


High Resolution Technologies - HRT - Music Streamer II+ USB DAC


Music Streamer II+ makes the music coming out of your computer sound exceptional. Technically, the MS II+ an audiophile quality external sound card for computers. The MS II+ takes over the job of processing the digital music stream from the computer that is critical to producing high quality sound. As a Big Brother to the MS II, the HRT Music Streamer II+ does exactly the same job as its less expensive sibling, but is outfitted with a higher quality Digital-to-Analog converter (DAC) and a much more sophisticated analog output stage.

Like other HRT products, set up and operation is super-easy: just take a good quality USB cable and hook the USB input of the MS II+ into any available USB port on the host computer. The MS II+ automatically performs an "electronic handshake" with the computer and tells it that the MS II+ is here, that it is to get all audio signals sent to it instead of the Digital-to-Analog converter (DAC) that is built into the computer, and that it, the MS II+, is in charge of all data-transfer timing instructions. Then just use a good quality set of RCA interconnects to attach the output side of the MS II+ to any available line-level analog input on your integrated amplifier, preamp, receiver, or powered loudspeakers, which gives you a volume control. The MS II+ connected to a computer is the equivalent of a very high quality CD player with a fixed 2.25V output that connects into a music system just like a CD player would through the right and left analog output jacks.

Now you are ready to stream some music, either by playing a disc directly through the computers optical drive, or read as a digital file from your computer's hard drive. Having the MS II+ in your system means never needing a stand-alone CD player again to enjoy all the music in your CD collection in high quality sound. If you happen to have higher-resolution files (up to 24/96k) stored on your HD, you can also play them in their full native resolution (no up-sampling).

The MS II+ provides full support for playback applications such as iTunes and Windows Media Player, as well as numerous others, allowing a direct, great-sounding connection between your computer and your entertainment system. You can also listen to streaming Internet radio stations or music subscription services through the MS II+ in much better sound quality than from your computer's built-in DAC.

Utilizing native Audio Class 1.0 drivers (present in all modern PC, Mac, and Linux computers) there are no extra drivers or software to install. Simply connect it to your computer via a USB cable (not included), confirm that the MS II+ the chosen device in the computer's preferences area, and you are ready to go. LED indicators show the current sample rate (32k, 44k1, 48k, 88k2 & 96k), as well as the state of the MS II+ 's mute circuit; you will always know at a glance your system's operating mode.

As with other HRT products, as firmware improvements become available, HRT's UpStream utility allows the Music Streamer II+ to be updated right from the computer's desktop in a matter of seconds.


  • USB Powered
  • Asynchronous Mode Operation eliminates timing errors (jitter)
  • Galvanic isolation of digital and analog stages
  • Line-Level analog output
  • Plug and play using standard audio class 1.0 drivers
  • 24 Bit operation
  • Supports 32k, 44.1k, 48k, 88.2k & 96k sample rates
  • Endplate LED lights identify sample rate
  • Upstream Utility for fast firmware upgrades
  • Designed and manufactured in Southern California.
  • One year manufacturer warranty.


Full Scale Output
        2.25 Volts RMS

Output Impedance
        100 Ohm

Frequency Response (20 Hz / 20 kHz)
        +0db / -.4dB

Noise Floor (DC to 30 kHz)
        4 uV RMS

S/N Ratio (DC to 30 kHz)
        115 dB

S/N Ratio (A-weighted)
        120 dB

THD+N (1 kHz Full Scale)

THD+N (1kHz -20 dB)

Jitter contribution (DC to 30 kHz)
        135 dB below full scale

USB to Audio output isolation
        200M Ohm

Sample Rate
        up to 96 kHz

Bit Depth
        up to 24 bit

USB transfer protocol

Power Requirements (USB Buss)
       400 mA

       5.6" x 2.3" x .875"

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