You can affect my impressionie listening object.
after two months of testing I can say that the companion One is a fairly balanced dac, call it transparent-neutral and able to highlight several details contained in the audio files.
tests were made with HQPlayer as software + NAA CUBOX-i I somehow put the player in Ramdisk and some other I put the executable Network Audio Deamon in Ramdisk.
the rest of the system: + studio monitors and subwoofers as volume control (not always connected) volume2 the SPL, the file (+ classical + jazz music Italian) have been played at the native resolution first and then oversampled PCM 192 and 384kHz and later in DoP DSD and 64 (for the little that I could use) in DSD 128.
the dac is carved from a single block of aluminum and is closed on both sides (front and back) with glass covers, with the six side buttons (3 per side) can control all processes and various audio set-up.
I use OSX and with this S.O. It requires no driver installation, with windows will, in the box there are a number of cables to suit all the needs of connection with the exclusion of one to use with the line-out.
the dac chip used is a saber ES9018K2Mhttp://www.esstech.com/PDF/ES9018-2M%20PB%20v2.1%20141016.pdf
With OSX can not be the native mode of DSD but I think it can be done in windows (I have not tried)
as it regards the WIFI mode dac has two modes, a direct (direct mode) and the other is the client mode.
Direct mode allows you to connect to a companion iPhone without using a wireless router as the client mode by entering a local address to set it up, honestly I have devoted little time to use wifi (not currently interested)
is the classic giant-killing? I do not believe it to 595 euro (being sold to the same value euro / dollar) you have an object that is more than just a dac, is small in size, battery power, is transportable, has wi-fi up to 24/192 , reads almost all PCM 44.1> 384kHz 32bit and DSD64 DSD128 and, in my humble opinion and in relation to the purchase price, is fine!
It has an optical digital output line-out of free mini-jack and a headphone output.
an aspect to be reviewed (write the designer) is that the re-ignition must adjust the output volume to the optimal level of listening, it does not keep in memory the volume previously set (perfection is not part of this world) but it could be a what you want.