The humble personal music player has seen many iterations over the last few decades. That doesn't mean that people aren't still giving the area some love, and HiFiMAN is definitely flying the flag with its HM-901 Reference Music Player. The unit incorporates dual Saber ES9018 32-bit DAC chips, with upsampling 20 24-bit / 96kHz. It claims to be able to play most lossless audio formats, including Apple lossless. Of course, it'll still play your regular MP3s too, should you so desire. One neat trick is a removable amplifier card which means -- at a future date -- you could be able to swap them out for other amp cards that bestow a different sound, much like different guitar amps etc. Other forthcoming features include gapless playback, and the ability to use it as a WiFi music server. If you want some hard numbers, then HiFiMAN states that the distortion is less than 0.003 percent, with a signal to noise ratio of 107dB. Want to know the stereo cross talk That'd be 86 db (line) and 76 db (headphone). Head past the break for our impressions.
The HM-901 is the follow-up to the firm's 801 model we saw a few years ago. While the 801 took a minimalist modern design, the 901 goes takes a straight-up retro vibe. The finish is a mix of textured black plastic that you might find on a classic camera and silver accents. The controls are a mix of simple click buttons and a physical jog-wheel (rather than a touch surface). As you can see, there is a small screen, but this beast is definitely audio only, so if you thought you might be able to sneak an episode or two of your favorite show on there, we're sorry to say, that won't be happening. Memory-wise, it's all about the SD card, so pick your capacity all the way up to 128GB we believe. There is also a companion dock, that carries the same vintage look and feel. One thing's for sure, this definitely has a distinctive look. And while it's not exactly slimline or light in the hand, this only really serves to remind you that you are holding something more serious than just any old me-too media player. Of course, looks and finish are one thing, but with a device that is selling itself on audio quality, the proof is in the listening. We tried it out with a variety of sound sources on some of the firm's own headphones, and we were extremely impressed with the quality. Classic, Opera and Jazz sounded incredibly clear, but, sadly, we didn't get chance to check it out with anything electronic. We're confident it would do the business though. If this sounds like something you can get behind, or have a large collection of FLACs you want to give an appropriate home, you can bag yourself one for the uncompressed price of $999, add another $399 if you want the dock. Both shipping in March.
According to HiFiMAN Founder and President, Dr. Fang Bian, \"The best technology and great sound is only as good as the user's ability to operate their device and access their music, quickly and easily. Ease of use was a high priority in designing the HM-901 along with creating a rich, sleek appearance. For example, on the User Interface for the HM-901, you'll notice that the buttons and a rotating navigation menu cleverly comprise the main interface. The innovative TAICHI UI and high quality volume controller also add value and performance to the entire operating system.\"
Dr. Bian went on to add, \"We see a clear parallel between digital photography and portable audio. For example, an inexpensive point-and-shoot camera does a reasonable job of taking pictures but cannot begin to compare with the imaging quality of a professional SLR. Same holds true for an iPod. It has adequate sound quality but cannot compare to the finest digital playback systems. The HM-901 has been extensively tested in double-blind listening sessions and compares favorably to the highest quality digital players. I believe that when music lovers and audiophiles know that they can have this level of sound quality in a portable player, they will readily see the parallel with digital photography.\"
The player Power supply Amplifier card Extension socket (Line out, coax input, coax output, USB cable, charge port) HiFiMAN will be exhibiting at CES 2013 in # 21706 in the LVCC South Hall. In addition to the revolutionary HM-901, on display and demonstration will be the entire line of HiFiMAN award-winning full-size headphones, headphone amplifiers and high-res portable music players, including the new RE-600 and RE-400 in-ear monitors.
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On the left side from bottom to top is a SDXC card compartment, a series of vents and a normal/balanced switch. The HM-802 has no internal memory for storing your files. All files must be stored on an external SD card that the player supports up to 128GB. Along the top you have a headphone output jack and nothing else.
The following impressions were gathered using my UERM custom as well as my AKG Q701, Fostex T50rp Paradox, and Hifiman HE-400. Amp modules used were the standard, IEM, and balanced amp modules. Most sound impressions were formed while using the IEM and standard amp module though. Throughout the review most sound impressions were formed with the player set to its HD setting. Various different types of source material were used while evaluating the HM-802 comprised of 24 and 16bit ALAC and FLAC as well as 24bit binaural. Some of the key records used to evaluate the HM-802 were: Jazz At The Pawnshop, Random Access Memories by Daft Punk, Audioslave by Audioslave, The Very Best Of Fleetwood Mac, Vegas by The Crystal Method, The Tron Legacy Soundtrack, Jazz In The Key Of Blue by The Jimmy Cobb Quartet, Fat Of The Land by The Prodigy, and Up Close by Otto Liebert and Luna Negra.
The HM-802 may not look like the sexiest player on the market but I doubt those looking for a true hi-fi sound will ever care. Personally, I think Hifiman players with their retro look have character and this is something seriously lacking in the market. Also, the fact that the HM-802 can be tweaked by swapping the amp modules is a great feature that allows real flexibility to better enjoy the sound.
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Large sample clinical retrospective studies about infection caused by Mycobacterium tuberculosis (TB) among the patients with hematological malignancies(HM) have rarely been investigated. The aim of this study was to analyze the clinical features and treatment of the HM patients complicated with active TB.
Most of the patients were male patients, with a malefemale ratio of 2.671, median age 41 years old (range 14 to 78). Among them, the median age of extra-pulmonary TB group was younger than the pulmonary TB group (38 vs 44.5 years), so did the neutropenia group when compared with the non-neutropenic group (38 vs 48years). Fifty-two cases80.3%were pulmonary TB, 14 cases were21.2%extra-pulmonary TB and other 8 cases12.1%presented as both pulmonary and extra-pulmonary TB. In addition, atypical clinical manifestations, such as high fever, cough, malnutrition, pleural effusion were the main clinical manifestations in our patients.
Twenty-nine patients(43.9%) were diagnosed with definitely etiological evidence while other 37 patients56.1%were diagnosed clinically. The extra-pulmonary TB group had a higher PPD test positive rate than that of the pulmonary TB group85.7% vs 46.2%P=0.014; The main characteristics of chest CT were as followsmediastinal or hilar lymphadenopathy, nodules, fibrous cord shadow, pleural effusion. The specificity and sensitivity of T-SPOT.TB test were 100% and 83.3% when 14 patients were checked by this test, which was a helpful tool for diagnosis. In addition, finding more ways to put the lesions under pathological examination was beneficial to the diagnosis of extra-pulmonary TB. 59ce067264