First, let me say that I received the H640P Edifier on-ear phones after I agreed to provide a review of one of several Edifier earphones; and I would like to thank Edifier for giving me the opportunity to review these headphones.  I did not request to review the H640Ps specifically, and I do not know how the company chose this particular model for me to review.  The majority of the earphones I own are in-ear phones, so this is the first time I have listened to and evaluated on-ear phones. 
 
The H640Ps arrived nicely packaged; the package not only included the headphones, but also a user’s guide, a shirt clip and a cable adapter. 
 


 
The H640Ps have a microphone/remote that is compatible with iPhones and most Android phones.  I have tested the mic/remote on both my son’s iPhone 6 and his iPod Touch, and it functions well.
 
Edifier advertises the H640Ps as Premium Mobile headphones with a chic design.  I received the black pair and they are attractive earphones.  These headphones also come in white and yellow as shown below. 

(Source:  Edifier webpage)
 
 
The headphones are light in weight; the head-band is made of a silicon strip which is attached to plastic side-stems and cups by stainless steel metal strips.  This design allows for size adjustment of the headphones. 

 
Additionally, the phone speakers (encased in light-weight metal housings) are attached to toggles in their cups to provide flexible movement and improved on-ear fit.  Each speaker is covered with a soft cloth material that has the appearance of microfiber cloth.

 
All in all, the H640Ps are comfortable headphones to wear and I was able to wear them for 1-2 hrs at a time without discomfort.  The speakers are connected to the plug by a somewhat thin straight 1.3 meter rubber-coated cable  Although the H640Ps are comfortable to wear and the headband appears fairly sturdy, I’m concerned that the thin wire cable may not hold up well with long-term use.  Although I may be wrong, I would guess most H640P owners will not wear them while running or at the gym.   Because they are on-ear phones, the isolation is not very good, so these headphones are probably not best suited for the library or study hall either.  These headphones appear to me to be more suited to time spent sunning at the beach or by the pool, or while relaxing on a bench or under a tree at the park.  They also would do well for those who like to listen to music while taking long, leisurely walks …
 
The specifications of the H640Ps are as follows:
Frequency response, 20 Hz to 20 kHz;  Sound Pressure Level, 89 dB;  Impedance, 32 ohms;  Maximum power, 10mW;  Wire length, 1.3 m;  Connector, 3.5 mm stereo;  Weight, 110 gms.  The headphones have neodymium magnet drivers, but the diameter of the driver is not specified.
 
In regards to sound quality, the H640Ps are very interesting headphones.  Based on my available music players, these headphones appear to have been primarily developed for use with iPhones, iPods and other Smartphones.  When I received the headphones, I initially used them with my DAPs.  I tested them using a number of different music types including classic rock, pop, progressive rock, blues rock, blues and classical music.  I have three DAPs I tend to use for various different purposes.  The DAPs are all made by Xuelin and include the ihifi 960, the ihifi 800, and the ihifi770c.  I use the 960 for sedentary home-listening, the 800 for listening while doing chores around the house, and the 770c for portable away-from-home-listening.  Let me just say that the H640Ps do not pair well with any of these DAPs.  The sound quality is especially poor with the 960 and the more neutral 800.  The mids are overly represented and forward, with the bass and treble being muffled and muddy.  Although the stereo separation is good, the overall sound quality lacks depth and warmth.  Too much of the music on the high and low ends is under-represented or missing.  The vocals with the 960 and 800 come across as somewhat harsh and uncomfortable to listen to.  The H640Ps fared a little better with the 770C, but again the sound lacked depth and it is hard to separate lead vocals from background vocals.  The bass and treble is better represented, but the bass is muddy and the treble is a bit sibilant. 
 
After several attempts to listen to several different types of music with the H640Ps and my 3 DAPs, I decided to give up and I tossed them to my teenage son, who immediately plugged them into his iPod Touch.  To my surprise, he told me that the headphones sounded good to him, and he would like to have them.  I was a bit shocked based on my experience with my players, so I then listened to the H640Ps with his iPod and later, his iPhone.  He was absolutely correct.  The H640Ps pair very nicely with these Apple products.  The bass, mids and treble are all well represented and clear.  The bass is not muddy and does not encroach on the mids.  The mids are no longer overly forward and vocals sound natural and have nice depth.  Treble is not sibilant.  The stereo separation is nice and the soundstage is wide and deep enough to provide nice separation of the different instruments and lead/backing vocals.  I actually enjoyed listening to my son’s iPod while using the H640Ps.  So, I do not know how the H640Ps will pair with other DAPs, but if the user has an Apple product, he/she should be pleased with the sound quality he/she gets from the H640Ps.  I do not have access to an Android-based smartphone to evaluate sound quality with the H640Ps.
 
All-in-all, the H640Ps are stylish, light-weight headphones that should be attractive to teens and young adults who listen to music with iPhones and iPods.  They appear to be well-built, but I’m concerned that their thin wire cable may not hold up well with daily, long-term use.  At this point, individuals using non-Apple DAPs or smartphones need to recognize that the H640Ps may not pair well with their respective players.  The list price for the H640P is $39.99 on the Edifier web site (with free shipping to the 48 continental United States) and ~$34 on Amazon.  With its current price tag, I would have expected the H640Ps to be more compatible in terms of sound quality with a wider range of DAPs.  Since they don’t appear to be, I can only give them a rating of 3 out of 5 stars.
 
Again, I would like to thank Edifier for the opportunity to review their H640P headphones.

Let me first say that I received the P180 Edifier earbuds after I agreed to provide a review of one of the Edifier earphones; and I would like to thank Edifier for giving me the opportunity to review these new earbuds.  I did not request to receive the P180s specifically, and I am not sure how the company randomized delivery to volunteer reviewers.  I do have to admit that I am not a huge fan of earbuds; historically, I have not liked the fit, the lack of isolation and the absence of some detail in the music when I have compared them to my IEMs.  However, I will do the best I can to review these earbuds, while comparing them to 2 other earbuds (Philips and Hisoundaudio PAA-1) I have in my collection.  One of our Head fi.org colleagues, Bloody Penguin, is an admitted fan of earbuds and has also reviewed the P180 earbuds, so please read his review to get his perspective.
 
The P180s arrived in a nice package with a user's guide, a pair of foam earpads, and a cable adapter.  The P180s have a microphone/remote that is compatible with iPhones and most Android phones. I have tested the mic/remote with my iPhone and I can say it functions well. 

 
The build of the P180s is fairly standard for earbuds in this price range.  In fact, the shells for the P180s are exactly the same as the shells for the Philips earbuds (DIY) I received as a freebie from Dasetn.  I must say that the cable for the P180s is nicer than the cables on the Philips earbuds.  The cable of the P180s has a supple, rubbery texture, similar to the cable on the Hisoundaudio PAA-1s; whereas the cable on the Philips earbuds has a stiff, cheaper plastic feel.  In my opinion, the plug for the P180s is more attractive than the plug for either the Philips or PAA-1.
 

Left, Edifier P180;  Middle, Philips; Right, Hisoundaudio PAA-1.
 
 

Edifier P180 has the same shells as the Philips earbuds.
 

Left, Edifier P180;  Right, Philips.
 

Left, Edifier P180;  Middle, Philips;  Right, Hisoundaudio PAA-1
 
The specifications for the P180 and PAA-1 are somewhat similar:  
P180: Driver 16 mm; Impedance 32 ohms; Sensitivity 100 dB; Frequency response, 20Hz-20KHz; cable length 130 cm; connector  3.5 mm stereo
PAA-1: Driver 16 mm; Impedance 32 ohms; Sensitivity105 dB; Frequency response 20Hz-21KHz; cable length  119 cm (but unequal cable lengths for R and L sides); connector  3.5 mm stereo
(I am unable to find the exact specs for the Philips earbuds).  The P180s have a mic/remote that can be used with iPhones and most Android phones, neither the PAA-1 nor the Philips has a mic/remote.
 
The sound quality of all the earbuds depends on whether you use them with the foam earpads or not.  The earpads tend to increase the bass and take some of the treble away from all 3 earbuds.  I used the earbuds on my Xuelin iHiFi 800, which has a fairly neutral sound signature.  I tested them all with a variety of songs by artists such as A Perfect Circle, Puscifer, Adele, Jeff Beck and Aynsley Lister.  I personally prefer using the earbuds with the foam pads, because I can get a better, more comfortable fit this way.  Under these circumstances, I found that the PAA-1 had too much bass, with incomplete separation between bass and mids.  The bass had a tendency to overwhelm the vocals and the highs were muddied.  In comparison, both the P180s and Philips earbuds fared better with the foam pads.  There was much better separation of bass from mids, and treble was better preserved.  I enjoyed the PAA-1 sound quality more when the foam pads were removed, but I had a hard time getting a good, comfortable fit.  With further comparison between the P180s and the Philips earbuds, I found that the P180s provided more natural sounding vocals, and bass and mids came across as more "powerful" in the P180s.  In comparison, the overall sound of the Philips was a bit more recessed.  The P180s had a similar sound stage to the PAA-1s, and both had broader sound stages than the Philips earbuds. Even though I am still not a huge fan of earbuds, I do feel that the overall sound quality of the P180s (based on my preferences) is better than the sound quality of the PAA-1 or the Philips.  In fact, the detail and clarity that I get with the P180s (compared to the other 2 earbuds) come closer to what I experience with IEMs, and this is a big plus for me. To be honest, I don't know how much I will use these earbuds in the future due to my preference for IEMs, but my 16 year old son has already asked me if he could have them...  so, one way or another, I think the P180s will experience extensive play time in our family...  Although the P180s are a bit generic in their appearance, the cable that Edifier has used is a step up and the sound quality is quite good; at their price point, I feel they deserve 4 stars.  (For comparison, I would rate the PAA-1s 3.5 stars and the Philips 3 stars).
 
In terms of cost, searching Amazon tonite (11/24/15) I found the Hisoundaudio PAA-1 earbuds for ~$14 (US) and the Edifier P180 earbuds for ~$17.  I was unable to find an exact match of the Philips earbuds on Amazon, and it appears the Dasetn website is no longer active.
 
Finally, I want to thank Edifier again for the opportunity to review the P180s and wish them the best of luck with their business.

A Brief Review of the FiiO X3 2^nd Generation DAP with Comparisons to the Xuelin iHiFi 800.
Firstly, I would like to thank Mr. James Chung for allowing this preview of FiiO’s new X3 2^nd Generation DAP.  I would also like to thank “Joe Bloggs” for coordinating the world preview tour, and his help in the Head Fi.org forums.  As directed by the folks at FiiO, this review has been done on one of the pre-production units of the X3 2^nd Gen DAP; and it was loaned out to us for free, except for the cost of postage to the next reviewer.  The information in this review is based on my experience with the loaner X3 2^nd Gen model and my Xuelin iHiFi 800 that I purchased with my own funds. 
Some Brief Remarks about the FiiO X3 2^nd Generation Player.
This is my first experience with any of the FiiO DAPs.  Prior to this opportunity, I had not listened to any of the FiiO DAPs, so I really do not know how the new X3 2^nd Gen compares to the first generation X3, the X1 or the X5.  Therefore, I did not have any previous real-life biases or assumptions of this player.  There are (as of this writing) 2 very complete (ie, encyclopedic) reviews of the X3 2^nd Gen by Brooko and Twister 6, and these reviews discuss the X3 2^nd Gen in much detail and offer comparisons to the X1, 1^st Gen X3 and X5.  I will not try to duplicate their work in my review.  These reviews can be found here:  http://www.head-fi.org/products/fiio-x3-2nd-gen-ultraportable-hi-res-dap.
After being able to assess the X3 2^nd Gen DAP in my review period, I can easily say that it is an outstanding music player.  It is quite attractive and is solidly built.  The functionality, file format support and firmware are all very impressive.  I have been impressed by the options that this player offers in functionality.  Not only does it serve as a high-quality music player, but it also can serve as a stand-alone DAC.  In addition to a headphone-out port, it also has a port for line out/coaxial out functions.  While the X3 2^nd Gen does not have any built-in memory, it does have a single microsd slot that is currently able to support up to 128 gb cards.  It also supports OTG (on-the-go) usb devices. 
The file format support is very impressive; it supports both lossless (including high resolution FLAC files, WAV, WMA, ALAC, APE, and DSD) and lossy file (eg, MP3, AAC) formats.  In addition, the files can be listed as individual songs, by albums, by artists, by genre and by personal favorites.  The player also supports playlists.
The UI and firmware for the X3 2^nd Gen are also quite impressive; I did not encounter any significant firmware bugs during my time with the player.  I must admit that when I first received the player, there seemed to be some difficulty with the volume control buttons, because when I would press them to increase/decrease volume, the buttons did not respond properly.  However, after the first day, the volume buttons worked properly, and I had no further problems with them.  Although I am not a big fan of scroll wheel navigation, the X3 2^nd Gen appears to have a fairly decent one; as others have pointed out, however, one click of the wheel does not always result in 1 advancement on the screen.  A couple of the functions that I really like on the X3 2^nd Gen are gapless playback, resume play, and automatic pause when the earphone plug is removed from its port.  The gapless playback worked very well with my files.  I was happy to see a 10-band graphic equalizer, high/low gain “switch”, and R/L balance control.  The user is also offered several options to unlock the key pad.  Please refer to the extensive reviews by Brooko and Twister 6 for more detailed information re: features of the X3 2^nd Gen.
There are only a few areas where I could think of any constructive criticisms.  The first has to do with the Theme selections on the player.  Some of the theme colors (in my opinion) on the pre-production model are just not attractive at all, and others could benefit from more contrast between lettering and background to make it easier to see which line you are currently on.  The other issue I have involves the placement of the On/Off and Volume buttons on the upper left side panel of the player.  As a right-handed person, I hold the player in my left hand and use my right hand to operate the scroll wheel and front-panel buttons.  As I hold the player in my left hand, my left thumb is on or around the On/Off and Volume buttons. Many times when I was placing/replacing my earphone plug into the HO port, I found that I had inadvertently pressed one of these buttons in the process.  This is minor issue, but certainly something I would have to get used to.
Xuelin iHiFi 800 DAP
Please refer to this thread for more detailed information on the iHiFi 800: http://www.head-fi.org/t/755399/xuelin-ihifi-800-a-brief-introduction.
The iHiFi 800 was released by Xuelin in February 2015.  The player is a bit of a diversion for Xuelin in terms of hardware and form factor.   All of Xuelin’s other current players use Wolfson DACs (960s, 812v2, and 770 have Wolfson 8740 and the 770C has Wolfson 8718).  The 800 uses the Sabre ESS9018K2M DAC.  All the current Xuelin DAPs use Rockchip processors.  The 800 has three LME 47926 opamps and uses the OPA1662 as its LPF.   Compared to the other Xuelin players, the iHiFi 800 is a neutral sounding DAP.  In regards to form factor, the 800 is quite a bit smaller than the 960 and 812v2.  The 800 measures 100 x 49 x 16 mm and weighs about 120 gms, while the 960 measures 110 x 70 x 26 mm and weighs about 300 gms.   On the other hand, the 770s resemble an iPod Touch and weigh 103 gms.  All in all, the iHiFi 800 is a solidly built, high-quality DAP.  It is an attractive player with sturdy aluminum alloy casing that comes in either black or silver color versions.   It has 8 gb of built-in memory storage and a single microsd card slot that supports up to 128 gb cards.  It does not support OTG devices.  The iHiFi 800 currently sells for ~$250 US (price includes standard shipping).

 FiiO X3 2nd Gen (L), Xuelin iHiFi 800 (C), and Xuelin iHiFi 770 (R)
 
FiiO X3 2^nd Gen vs.  Xuelin iHiFi 800
For the remainder of my review, I will tend to focus on functionality, file format support, firmware, and sound quality between these 2 players.   I have included several pictures that show the X3 2^nd Gen and the iHiFi 800 side-by-side.  In all pictures, the FiiO X3 is on the left and the Xuelin iHiFi 800 in on the right.
Front view
 
Bottom panel view
Top panel view
Left side panel view
Right side panel view
Back view
 
Well, when it comes to functionality, the X3 2^nd Gen appears to offer more than the iHiFi 800.  The X3 can function as a usb DAC and has both line out/coax out in addition to headphone out.  The 800 does not function as a stand-alone DAC, and while it has a line out, it does not have coax out.  The X3 supports in-line headphone remote, whereas the 800 does not. The X3 supports OTG usb devices whereas the 800 does not.  Both players have a single microsd card slot and both currently support up to 128 gb cards.  The 800 does have 8 gb of on-board memory storage, whereas the X3 has no on-board memory.  Both have high/low gain options. The battery life on the players appears to be similar, somewhere between 10 and 12 hrs.
The X3 has much better file format support than the 800.  The X3 2^nd Gen easily handles 24/192 FLAC, AAC, ALAC, along with WAV, MP3 and lower resolution FLAC files and also has native DSD decoding.  The 800 currently does not support high resolution FLAC files, AAC or ALAC files and does not have native DSD decoding.  The X3 offers gapless playback, whereas the 800 does not.  Neither player offers cue support.
The X3 2^nd Gen easily bests the iHiFi 800 in firmware development.  The firmware on the 800 is currently somewhat simplistic in comparison to the X3.  FiiO appears to have literally adopted many of the more popular features from Rockbox and adapted them to the X3 2^nd Gen.  Needless to say, I am quite impressed.  However, when it comes to navigation through the UI to access all these nice features, I’m not sure FiiO comes out on top.  Of course, this will be very dependent on an individual user’s preferences.  Navigation for the X3 2^nd Gen primarily uses a combination of a scroll wheel and 4 physical buttons on the front of the player.  Volume control and on/off buttons are on the upper left side of the X3.  Navigation for the 800 is thru a set of 7 physical buttons on the front of the player; on/off and volume control buttons are included in the front buttons.  For “in-pocket” use the 800 has separate “pause/off”, “forward” and “reverse” buttons along the upper right side panel.   I much prefer the button control/navigation of the 800 myself, but I am sure others may prefer the scroll wheel layout of the X3.  I do have to say that the scroll wheel on the X3 works pretty well, but there is some extra play in the wheel that can be a bit frustrating at times.   I also find the volume control buttons on the front of the 800 to be more convenient/easier to use than the volume control buttons on the upper left side of the X3.
Well, despite all its apparent short-comings in comparison to the X3 2^nd Gen, as it stands now, I do believe the iHiFi 800 has better overall sound quality than the X3 2^nd Gen.  I reached this conclusion after 4 days of intense comparison between the 2 players.   For the most part, I found more differences in the players when I used IEMs with dynamic drivers, and the sound quality was more similar when I used IEMs with balanced armatures.  I do not currently own any hybrid IEMs, so I cannot comment on these.  For the most part, I preferred IEMs with dynamic drivers with these 2 players, because the sound stage with both players appeared to be a bit narrower with BA IEMs.  FiiO has since reported that some modifications will be made in sound prior to general release of the X3 2^nd Gen, so I have no idea how my current comparisons will hold up over time.   Let me just say that the X3 2^nd Gen is a nice sounding DAP, and in no way do I want anyone reading this review to infer that the sound quality is not good.  The differences between the 2 players are all relative and my conclusions are based on my own preferences.  Before I get into the discussion of sound quality, one of the strongest attributes of the 800 is its absolute black background.  I hear no hiss between songs, and there are no pops/clicks when the player is turned on/off or between songs.  The black background (in my opinion) gives the music better definition, body and dimension.  The X3 has a dark background as well; although I did not hear any hiss with any of my earphones, the player does have subtle clicks/pops when it is powered on/off and between songs (except when gapless playback is used).
When it comes to sound quality, both players have similar sound stages in terms of width.  The most significant difference between these 2 players is in bass presentation and vocals.  The 800 has a more neutral presentation and the X3 has a warmer presentation.  While the bass on the 800 is less in amount when compared to the X3, it is better in quality.  The bass on the 800 is punchier and more clear/detailed; in comparison, the bass on the X3 is a bit heavier (think thud instead of punch) and slightly fuzzy.  With the earphones I prefer to use with the 800 (YinJW ie800), the bass on the X3 creeps into/distracts from the midrange.   The vocals on the 800 are very, very nice, and this is a major strength of all the Xuelin players I have.  The vocals on the 800 have better clarity and dimension than the vocals on the X3, and as a result, I find the vocals to be more “musical” and life-like on the 800.  The bass quantity of the X3 can be reduced by using “cooler” earphones (like the Ostry KC06), but this does not really improve the vocals in my opinion. 
The 800 has better separation of low, mid and high frequencies than the X3, and this results in better clarity of detail and improved instrument separation/placement. 
(As a complete aside, for those readers who have the Xuelin 770/770C and Ostry KC06 IEMs, the sound quality of the X3 2^ndGen using the KC06 IEMs is very similar to the sound quality using the A HO port of the 770/770C (more neutral HO) with the KC06 IEMs; except the X3 2^nd Gen has a wider sound stage and the 770s have slightly better vocals.)
Both players had plenty of power to drive all my IEMs; so I would personally not routinely use a separate headphone amp with either one.  I did try out both players using their lines-out with my Neco Soundlab v2 amp (with dual AD8610 opamps).  I could not really appreciate any real improvements in sound quality with the 800, but the sound quality of the X3 appeared to improve.  With the amp, the bass on the X3 was reduced/more refined and there was better separation between lows, mids and highs.  The vocals on the X3 seemed to benefit with the amp as well.
Final Thoughts
Overall, the FiiO X3 2^nd Gen is a very nice DAP.  The obvious strengths of this player are its functionality, file format support and firmware.  The sound quality is quite good, and with properly paired earphones, the user should be quite satisfied.  At its price point (approx $200 US), there appear to be few, if any, other players at present that can match its overall value.   I predict the FiiO X3 2^nd Gen will be very well received when it is released for general sale.  It is clear to me that FiiO has set a new standard for DAPs at this price point, and other manufacturers will need to step it up quite a bit to remain competitive.  I certainly wish FiiO good luck and want to thank them again for this opportunity to review their new, high-quality DAP.