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Think of the Music Streamer II as a product that makes the music coming out of your computer sound as good as possible. Technically, the MS II is an external sound card for computers. To improve your computer's sound quality the MS II takes over the job of processing the digital music stream from the computer that is critical to producing great sound. While its cost is quite low, its performance is anything but.

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 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 directly by playing a disc through the computers optical drive, or read as a digital file from your computer's hard drive. You will literally never need a stand-alone CD player again to enjoy all the music in your CD collection in high quality sound. If you happen to have other higher-resolution files (up to 24bit/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.

Powered by and connected to a host computer's USB bus, the MS II's circuit design and execution is on par with the more expensive Music Streamers, all of which boast a unique topology that, in totally isolating their power supplies from those of the host computers, allows an unprecedented degree of electronic isolation and quieting from these machines, so that having to listen to your computer's nasty background noise and other sonic grunge along with your music is now a thing of the past. Digital-to-Analog processing inside the MS II is given a big helping hand by HRT's proprietary asynchronous-mode data transfer software, which allows the MS II to take control of the transfer of digital information away from the computer and onto itself, effectively eliminating jitter in the digital data stream, further enhancing the MS II's sonic performance; all of the subtle timing cues that help to get the music's timbres and colors correct are preserved without degradation or distortion 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.

Designed and manufactured in Southern California.

Full Scale output 2.25 Volts RMS
Frequency Response (20 Hz/20kHz)0dB/-.4dB
Noise Floor (DC -> 30 kHz)25 uV
S/N Ratio (DC -> 30 kHz)99 dB
THD+N (1 kHz FS 44.1 kS/s).002%
USB to Audio isolation> 200M ohm
Data Rate up to 96 kS/s
Sample Depth up to 24 bit
Transfer Protocol asynchronous
USB type1.1 or above
Power Requirements (USB) 250 mA
Dimensions5.1" x 2.3" x .875"

The Music Streamer II, available through Audiofreaks, is its most affordable model, yet it’s good enough to make the average laptop sound like proper hi-fi... (read more)
The Music Streamer II, available through Audiofreaks, is its most affordable model, yet it’s good enough to make the average laptop sound like proper hi-fi. Simply plug your computer into the USB connection on one end, connect your hi-fi using the analogue outputs on the other, and the small but solid HRT handles the digital -to-analogue conversion. And it does so in serious style. Playing The Far Road from The Road soundtrack, the sound is precise and fluid. The leading edges of notes are terrifically well-defined, but they degrade with organic subtlety and realism. Detail and dynamics are exceptional, revealing every nuance in the haunting recording. It’s simply a perfectly balanced, bold and beautiful delivery, and for a DAC costing just £140, that’s an incredible feat.
WhatHiFi
I have been enjoying the Music Streamer II for a couple of months now and will be purchasing an iStreamer.......these products truly are timely and you deserve kudos and some more kudos for producing very listenable dac's that put to shame some very expensive products I've owned in the past.
Dean Singh, Edmonton Alberta, Canada
This DAC seems to be able to really open up even compressed recordings in MP3 formats. This is quite good, it makes MP3s bearable to listen to again! Overall, the design is understated and fits in well with your desk. There aren't any annoying flashing lights or bulky wall and cable warts to hide.
Linda Shollenberger
Amazon Review
My shopping requirements were for a DAC that supported a minimum 24/96 asynchronous USB and provided sampling rate indicators... (read more)
My shopping requirements were for a DAC that supported a minimum 24/96 asynchronous USB and provided sampling rate indicators. I auditioned several DACS from highly regarded audiophile companies that ranged from the $149 for the HRT II streamer up to $1600 for a certain Canadian manufacturers unit. The three best sounding DAC's were easy to listen too and provided very good sound fidelity. Although there was a slight difference in soundstage and detail with the higher priced DAC's the HRT got me 95% of the way and I could not justify the substantial additional investment. I bought the HRT and am absolutely satisfied at the ease of setup, great sound, low power draw and elegant, simple design. If you need a great USB only DAC for a steal of a price, just buy the HRT.
Tony Varela, Seattle
Just to let you know that I am very surprised and absolutely delighted with the performance of my Music Streamer II. I can now enjoy my music again :-) .
Joao Santos Silva, Colchester, UK
The sound is superb. I am hearing parts of the music I've never heard before... (read more)
The sound is superb. I am hearing parts of the music I've never heard before. I set the player (Media Monkey) on random and listened to everything from rap to country to rock to folk to flamenco. A Tom Petty song came on and I couldn't believe it: there were some 2nd guitar parts and harmonies I either never heard before or they had been so muddied up in the mix that they were unintelligible. I highly recommend this product. For $150, a good speaker system, so good quality connector cables you can have a fantastic music experience!
Stephen Keleher, CA
Amazon Review
This is truly an amazing product that does what it was designed for - streaming high fidelity music. I am an extremely satisfied customer. Kudos for a job well done!
Robert Panlilio, New York
Because I really like this little gadget and have told others about it for the money I think it would be hard to beat... (read more)
Because I really like this little gadget and have told others about it for the money I think it would be hard to beat. And in many cases I don’t even know that more money would do the job either. I had a original music streamer and got the music II. I was so convinced about your product I gave not sold one to a friend and also gave him a set of headphones and headphone amp just to get him started in the right direction. Really nice product. Thanks
David Larsen
It's FUN. Enjoyable. It gets out of the way and facilitates toe tapping, emotionally involving, pleasure of music... (read more)
It's FUN. Enjoyable. It gets out of the way and facilitates toe tapping, emotionally involving, pleasure of music. Surprisingly few components or systems pass this test...One could also spend an order of magnitude more and be disappointed in an expensive audio toy that is less musically satisfying than the HRT. One could instead get ten HRTs, and give away nine to friends. Cheaper than therapy, and more relationally rewarding.
33 Chairs
Amazon Review
Not just bargain of the year but one of the greatest audiophile bargains of all time, the HRT Music Streamer II is going to change the computer audio map forever... (read more)
Not just bargain of the year but one of the greatest audiophile bargains of all time, the HRT Music Streamer II is going to change the computer audio map forever. A 96kHz, 24 bit DAC with asynchronous USB input, the Streamer II goes spec for spec against excellent multi-thousand dollar DACs from Ayre, dCS and Wavelength… and does so at just $150! Its bigger brothers offer improved performance at slightly higher price points and the upcoming Streamer HD brings 192kHz sampling rates. Even on the briefest of auditions, it’s clear this really is a game-changer.
Alan Sircom
AVguide.com