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    The Computer Audiophile

    Astell & Kern AK100 Portable High Resolution Music Player Review

    thumb-200px.pngI heard about the Astell & Kern AK100 portable music player from iriver a few months ago and was impressed by its appearance online. The player looks really nice compared to almost every other player available including many mobile phones. Shortly after perusing the Astell & Kern website I moved on to other items of the day and completely forgot about the player. Fortunately iRiver contacted me a couple weeks ago offering the Astell & Kern player for review. I happily accepted. Since its arrival I've been like a little kid who received the latest game console for the holidays. I can't stop listening to my favorite music through the Astell & Kern AK100. The sound is so much better than my iPhone 5 that I really can't go back to such an unresolving and muddy sounding device. I'm rarely this excited about a new audio component. My excitement reminds me of the times when I've purchased a new component or pair of speakers and I couldn't stop listening to all of my favorite tracks just to hear them in a new way. I'm absolutely hooked on the Astell & Kern AK100 and I couldn't be more thrilled.[PRBREAK][/PRBREAK]

     

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    What Is The Astell & Kern AK100

     

    3-250px.pngThe Astell & Kern AK100 is a portable music player made by iriver. This player is so much more than its name implies and most importantly it sounds so much better than typical portable music players. The AK100 is made of nicely brushed aluminum that feels really good in the hand. The unit has a substantial feel to it although its 2.33" x 3.11" x 0.57" frame isn't heavy. When I unboxed the AK100 I was surprised by the unit's small palm sized housing. All the photos online make it look a bit larger than real life. Speaking of unboxing, the Astell & Kern is packaged like a true high end audio product. Opening the unit is like opening a finely wrapped present. Apple is no longer the sole portable audio manufacturer who has mastered the art of packaging. The AK100 features a 2.4" IPS touchscreen for all but the most basic navigation and playback control. The screen is nice but nothing to write home about. It enables the user to control the unit and get on with listening to music.

     

    Internally the Astell & Kern AK100 contains a Wolfson WM8740 24bit, 192kHz DAC. The DAC supports all relevant PCM sample rates including 44.1, 48, 88.2, 176.4, and 192 kHz at both 16 and 24 bits. File formats supported include audiophile favorites AIFF, WAV, FLAC, and ALAC. The AK100 features built-in 32GB NAND memory that can be supplemented by two 32GB micro SD cards for a total storage capacity of 96GB. Considering the stellar sound quality of the AK100 I'm willing to give up my 160GB iPod Classic for the 96GB of sonic bliss. I realize this review is beginning to read like a commercial for the Astell & Kern but I have to be honest about how impressed I am with this little device.

     

    The Astell & Kern is much more about sound quality and using the product than it is specs and features. Sure the ability to input or output optical digital audio and its signal-to-noise ratio, crosstalk, etc… are nice, but this device is about moving great sounding music from one's listening room to any location in the house or on the planet. I can't remember the last time I sat in my living room listening to such quality sound reproduction while looking out the front window. I'm usually stuck downstairs in my listening room with small rays of sunlight seeping through the bushes and small windows. It is really enjoyable to have great tunes and great sound anywhere.

     

    As a music aficionado who can't get enough I listen to music through headphones every night while falling asleep. This is usually done with an iPhone 5 and Ultimate Ears ue11 Pro in ear monitors. The combination is less than perfect but the small iPhone and IEM earphones are hard to beat for convenience and staying on good terms with my wife. I also use this combination while traveling quite a bit. Thus the reason why I compared the Astell & Kern to the iPhone 5. Both are portable music players that can be outperformed by a number of large desktop headphone amps, but that's not the point. Portable high end sound is what the AK100 is all about. In my small headphone collection is a Ray Samuels SR-71A that I used to connect to my iPhone 4's analog output. Based on memory I believe the AK100 outperform the iPhone 4 / SR-71A combination in sound quality and easily inconvenience. The two piece iPhone 4 / SR-71A package was always a hassle. In fact I stopped bringing it with em on the road because I hated the two piece cluster with an extra cable.

     

    Back to listening a night with the ue11 Pro and the Astell & Kern. One unexpected advantage of the AK100 is its inability to conduct business such as emails, phone calls, and text messages. I never realized how nice this would be until I laid down with the unit and pressed play. I was in my own uninterruptible world safe from the next flame war taking place in the CA forum or the next meaningless text message from a friend spending too much time at the local Regal Beagle. Most of my listening through the Astell & Kern was done with CD quality 16/44.1 music. This allowed me to compare apples to apples as my iPhone 5 only accepts 16/44.1. From the very first track it was no contest. Keb' Mo's Every Morning was crystal clear with excellent separation between each guitar string. The same track played through the iPhone 5 and ue11 Pro combo was very muddy with the guitar often sounding like a one-stringed instrument. Listening to Miles Davis' Kind of Blue through the AK100 was much closer to the sound of my main system than it was to the iPhone 5 or even the iPhone 4 / SR-71A combo. Switching to high resolution material was equally as enjoyable. Passacaglia from the Kansas City Symphony is a go-to track I both like and use as a test of audio components. Recorded by Keith Johnson at Reference Recordings this track has serious dynamic range and displays both delicacy and power of an audio system. The Astell & Kern reproduced this track very well. I don't think I've ever heard it this good on a portable system. Ottmar Liebert's One Guitar at 24/96 sounded excellent as well. Many of the attributes heard in the Keb' Mo' track were present with this complete album. Each pluck of the guitar string was clear as day and the overall sound put the iPhone 5 to shame. Switching back and forth between the AK100 and the iPhone 5 during this review I frequently lost interest in all the music played through the iPhone. Once one hears something better it's impossible to go back to subpar performance. Sure the music was good but both the music and the sound was good through the Astell & Kern.

     

     

    Conclusion

     

    cash-logo-black-thumb.jpgThe Astell & Kern AK100 is the best portable music player I've yet heard. The fact that it handles high resolution audio up through 24 bit / 192 kHz is just a bonus. Both my high resolution and CD quality 16 bit / 44.1 kHz music sounded superb through the AK100 and Ultimate Ears ue11 Pro earphones. The build quality of the AK100 is terrific with the exception of the volume knob that's a little cheap feeling to the touch. The all aluminum housing is a delight to handle. The AK100's expandable storage from 32GB (built-in) to 96GB (via Micro SD card) is a great plus considering how much music one will want to hear through this high end component. I'd love to make the Ak100 the heart of my portable audio solution. I highly recommend the Astell & Kern Ak100 for all computer audiophiles and music aficionados. It's simply that good.

     

     

     

     

     

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    I bought this from ALO in a package with a Continental amp and a short cord. A wonderful combination with either the dazzling Audez'e LCD 3 or venerable Etymotic ER-4p. I was hoping that the Astell & Kern could drive the Etys without external amplification, but even they sounded much better with the Continental in between. I wonder if the mod helps. It would make a much more compact package without the Continental. Chris, you have these IEMs. What's your verdict?

     

    I can confirm that 64 GB microSDXC cards work just fine if reformatted to FAT32. Windows can't do this on its own. But this guy's Ridgecrop Consultants Ltd little ap does it without problem. Do use it and donate a couple of quid for his trouble.

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    @The Computer Audiophile

    When Network Players have a screen to show Album Art, the image is arriving to the network player by the same "link" as music.

     

    According to the buffer size on the network player, the size of the image, etc, if you have an image in each file, as the UPNP server has to send a new image for EACH track, you can break for example gapless play.

     

    I have bought online HD music with a 4 MB image in each file....

     

    Best

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    My buddy picked up the ak100 and I heard it and like it a lot. I could notice a nice improvement even plugged into my car stereo compared to the iPhone. He is saying after updating the firmware that it is taking a long time like 30-45 seconds just to get the ak100 up and running from power off. Can anyone confirm that this takes this long to power up

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    Your buddy should have taken the SSD option.

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    My buddy picked up the ak100 and I heard it and like it a lot. I could notice a nice improvement even plugged into my car stereo compared to the iPhone. He is saying after updating the firmware that it is taking a long time like 30-45 seconds just to get the ak100 up and running from power off. Can anyone confirm that this takes this long to power up

     

    My AK100 loads 630 flacs totaling 18 gigs in 20 seconds using firmware 1.33.

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    I received my AK100 yesterday.

     

    It’s an interesting device, obviously well made; the anodized aluminum case gives a sense of value when you handle the AK and I do not share Chris’s criticism of the volume wheel.

     

    The documentation is poorly done. The interface is adequate but the small LCD screen limits the interface designers in any attempts to provide a more functional interface.. Setup takes place automatically when you turn the thing on and most people likely to be purchasing this device will figure out how it works without having to bother with the unfortunately designed quick start guide and user manual. The iRiver plus4 software, which is limited to PC only, does not have any useful purpose as far as I can tell. To get going, all you need to do is plug in the USB cable, select either “charge” or “connect disc” on the screen and you are off and running. Experiment with moving around the screen and you will figure everything out quickly. (You will have to experiment anyway since many things are not addressed in the documentation), When you select “Connect Disc” you will see the AK100 memory and any memory cards appear in your finder just like any other devices and you can drag and drop from whatever source you wish to whichever of the three drives you choose. I transferred files simply by dragging from a MACRiver playlist to the AK with all files being properly copied and I understand the same thing works with iTunes.

     

    My unit has the “Vinnie” mod and the sound is great. The AK100 really “shines” with properly mastered recordings and high-resolution stuff. When you compress a 160 GIG high resolution portable stereo system into an aluminum box 2.3” x 3.1” x .57” that weighs a little over 4 ounces and get a result this good it really makes the criticisms of the system largely irreverent because none of the criticisms that I have experienced or read about have a significant impact on the ability to use an enjoy this little device.

     

    Now I’m motivated; I think I’ll get a FitEar To Go 334 if I can find one somewhere.

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    Good news and bad news.

     

    Good

    Confirmation that 64 GB SDXC cards work fine. So I upgraded the available space to 160 GB

     

    Bad

    - Writing to those cards inside the device is much more slower than directly from a USB adapter.

    Those little micro cards are very tiny, and getting them in and off the device is not so easy, and I do not have so big fingers :)

     

    - With about 110 GB of music, mix of Flac, ALAC in 16/44, 24/88-96-176-192, each time you add a single track, updating the library requests a full parse, and it takes about 10 minutes. Painful.

     

    Cheers

    Thierry

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    I bought this from ALO in a package with a Continental amp and a short cord. A wonderful combination with either the dazzling Audez'e LCD 3 or venerable Etymotic ER-4p. I was hoping that the Astell & Kern could drive the Etys without external amplification, but even they sounded much better with the Continental in between. I wonder if the mod helps. It would make a much more compact package without the Continental. Chris, you have these IEMs. What's your verdict?

     

    I can confirm that 64 GB microSDXC cards work just fine if reformatted to FAT32. Windows can't do this on its own. But this guy's Ridgecrop Consultants Ltd little ap does it without problem. Do use it and donate a couple of quid for his trouble.

     

    I was thinking of the same combo, with Fostex TH600 phones. The 600's are 25ohm the continental should drive them fully? What about direct, do you think it can drive 25ohm cans?

     

    Can you add some pics of the stack?

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    Can we manage the song sequence in iriver 4 like what we can do in playlist in itunes???

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    Hi MJ - There isn't a simple answer to your question for two reasons. 1. The products are so different, and 2. it depends on the headphones used.

     

    When traveling I use my Ultimate Ears IEMs. My Sennheiser HD600s are way to inconvenient for traveling. The DF wasn't the best match with my IEMs. The AK100 was terrific with my IEMs. Thus I prefer the sound quality of the AK100 for travel with my IEMs.

     

    why not consider HM801 even better then ak100 ! meizu, sony, tera ,are highest end as well

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    Hi Chris are you planning a review of the AK240?

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    Hi Chris are you planning a review of the AK240?

    Not in the near future, but I'd love to review it.

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    Hi Chris are you planning a review of the AK240?

     

    Anyone here planning to buy one?

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