Article Index
FiiO X7
p3 Sound Quality
p4 Conclusion
p5 Measured Performance
All Pages


The bottom of the player with an AM1 module attached. It carries the

headphone output and microUSB connector that meets the OTG (OnTheGo) standard.


FiiO’s stated weight for the X7 is 220gms, higher than our measured weight, but that’s because the review sample came with a standard ‘low power’ (as they put it) AM1 bolt-on module, designed for in-ear headphones. There are, in addition, medium and high-power modules, as well as a balanced output module, but little info is available on them and when I contacted the factory for details they were away for the CNY, they said (Chinese New Year). The modules are secured by two tiny Torx screws; a screwdriver and spare screws are supplied.

Where players I have reviewed over the years seemed to gain outputs as their price rose, the X7 with AM1 goes back to basics. There is one headphone output in the AM1 module, a standard 3.5mm stereo jack at the bottom of the player, a slightly awkward place to be. The top face carries the only other output, a switched Line/Coax socket, Coax meaning an electrical digital connection in this case, not a co-axial optical output within a 3.5mm headphone socket, as used by Apple and Astell&Kern. 





The Pure Music mode play window shows album artwork, graphic equaliser, favourites ... and more.


FiiO supply a special adaptor cable with four-pole jack to phono line socket so a standard digital coax S/PDIF connecting cable can be used. You can’t use this socket for headphones because Line has no volume control: when switched to Line it is a fixed output suitable for the CD input of a hi-fi amplifier, using a 3.5mm stereo jack to Phono adaptor lead, not supplied.


In addition to these two sockets a microUSB carries power and mates either with the K5 docking station or connects to a computer through a microUSB-to-USB A cable so music files can be uploaded; it is seen as a mass storage device. Our X7 could not be used as a DAC; FiiO said on their website at time of review that this would be made available in firmware FW1.8, but after upgrading our sample to FW1.8 there was no sign of it, either in the menus as a selectable option, or as an available Output on a Mac (running OS-X 10.11.3, El Capitan).



The track listing screen in Pure Music mode carries artwork thumbnails.


As FiiO’s top player, you can be assured that the X7 plays all digital audio file formats, normal and double rate DSD (but not quad) in .dsf and .dff file formats, as well as .iso (SACD) files. 

FiiO say the player will in a future firmware upgrade also support DoP through its digital output so DSD can be sent to an external DAC like Mojo. Mojo offers better performance, measurement shows, so this is a potential upgrade. All Apple file formats are supported, WAV and FLAC of course, DXD and all the old compressed formats.  

The X7 runs on Android, unlike their other players, and this complicates its user interface by introducing two basic modes: Android and Pure Music mode. I ran in the latter, but had to switch to the former to go online etc; a re-boot is needed – not exactly convenient. 




The graphic equaliser has a range of preset modes, plus a user adjujstable mode.

It shows response in a graph.



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