Trusted Reviews may earn an affiliate commission when you purchase through links on our site. Learn More

FiiO QOGIR E09K Review



  • Detailed, punchy sound and
  • Excellent build quality
  • Copes well at loud volumes


  • Need the E17 for USB playback
  • E17 gain/volume not disabled when docked

Key Specifications

  • Review Price: £109.99
  • Dock for E17 amp/DAC
  • Type B USB port
  • Gold-plated pre-out, line out and aux input jacks
  • Gain switch
  • 6.3mm headphone jack


The E09K from Chinese manufacturer FiiO is a desktop amplifier that’s designed to bring a bit of sparkle to music sound quality when listening through headphones. It’s ideal for music lovers or guitar players who like to listen to their tunes nice and loud at night without having to compromise on sound quality. The E09K is an updated version of the E9, adding some new features and addressing some of the criticisms levelled at its predecessor.
FiiO E09K

As a ‘desktop’ amp, the most obvious use is with a PC or laptop, bypassing its soundcard altogether and upgrading sound quality in the process. But to do you have to combine it with FiiO’s £99 E17 ALPEN headphone amp/USB DAC, which can be conveniently docked into the recess on top of the E09K.

FiiO E09K – Design

The E09K is a beautifully made device. It’s fashioned from high quality materials, including a solid and sturdy aluminium casing, topped off by a chic brushed black finish and alluringly curved edges. And at 149 x 96 x 56mm it’s a compact unit that won’t take up much space on your desk.

FiiO E09K

The front panel is dominated by a massive volume dial that spins with what Partridge would call a ‘nice action’. Next to it is a switch that allows you to select between the dock or the auxiliary input. On the other side of the dial is the all important 6.3mm headphone jack. A small blue light denotes that the unit is s
switched on.

FiiO E09K – Connections

Flip the unit 180° and there’s a decent range of connections. You get three pairs of gold-plated RCA jacks (as opposed to the 3.5mm outputs on its predecessor) – one is an aux input for external audio devices, one is a volume controlled stereo pre-out for driving power amps or active monitor speakers, and the other is a fixed stereo line output. These are covered by red and white rubber caps, which keeps them protected when not in use.
FiiO E09K

There’s also a Type B USB port for directly connecting a PC or laptop (a Type A to B cable is supplied) but don’t forget that you’ll need to dock the E17 in order to enjoy USB music playback. Also on the rear is a gain switch that provides a level boost for high impedance or low sensitivity headphones. The E09K’s power adapter plugs into the back.

The dock connector on top of the unit is sunk into a recess just wide enough to fit the E17. At first glance you’d be forgiven for thinking it was some sort of iPod dock, which it isn’t – although FiiO does sell a range of iPod/iPhone line out dock cables that can be used with its headphone amps, again for a potential step-up in sound quality.

Unlike other sites, we thoroughly test every product we review. We use industry standard tests in order to compare features properly. We’ll always tell you what we find. We never, ever accept money to review a product. Tell us what you think - send your emails to the Editor.