Portable music players are no longer all the rage, as shown by slimmed-down Apple iPod and Sony Walkman offerings in recent years. But for those who want high-quality music on the move, or even at home, a PMP may still be the answer. For all their multitasking magnificence, even the best smartphones can't offer that.

Chinese manufacturer FiiO’s line-up of PMPs starts with the modest M3, but its flagship M15 model on test here is the pinnacle of the company’s technological achievement. We’re talking top-of-the-line components and premium features – a superior music package to any smartphone or more budget dedicated player.

Features

The M15 has a dual configuration of AK4499 digital-to-analogue chips, bolstered by FiiO’s third-generation FPGA (field-programmable gate array) circuitry that promises more accurate clocking and reduced jitter.

Not only does that DAC claim an impressive signal-to-noise ratio of 140dB, it is also capable of natively playing PCM files up to 32-bit/768kHz as well as DSD512 and MQA tracks, which means you’ll more or less be able to play anything through it.

You can access locally stored music (there’s 64GB storage onboard, expandable by 2TB via a microSD card), in addition to networked music over DLNA. This music can be wirelessly streamed to Bluetooth headphones (up to aptX HD quality) and AirPlay devices. 

You can also listen through wired headphones connected to either of the M15’s two balanced outputs (2.5mm and 4.4mm Pentaconn) as well as the more conventional 3.5mm jack.

FiiO has implemented ‘active servo power’ technology to the M15’s final amplification stage, allowing the power output to automatically adjust according to the headphones used. With earbuds, the M15’s output can be optimised for minimal noise, while for harder to drive headphones, Big Driver mode can be enabled.

Select ‘USB DAC Mode’ from the Android interface’s pull-down menu, and the M15 can also act as a DAC for your computer – becoming a middle man between it and your headphones and enhancing the quality of audio playback. 

‘Android Mode’ mirrors the familiar Android phone interface, allowing users to open a browser or tool (such as the clock) and download music apps, such as Spotify, Tidal, Amazon Music, Deezer and TuneIn Radio, providing the FiiO is connected to a wi-fi network.

Build

Returning to ‘Pure Music Mode’ restricts the player’s functionality to the dedicated music player, which is logical to navigate. Album art is displayed and headers for artists, songs, albums and genres means browsing is quick and simple.

If your FiiO is being used as a source connected directly to your hi-fi system, you can use FiiO’s Link feature to browse and control the M15 from the FiiO Music app on your phone. Reducing the 5.15in screen time is one way to extend the M15’s battery life, which is otherwise a reasonable 15 hours of playtime from a single charge.

For on-the-go use, though, the FiiO is practical to use and hold. Roughly the proportions of a phone, but thicker, the M15 has ergonomically friendly curves and a pleasingly tactile volume dial on the top panel that is easily accessible in a natural hand position. 

The gold-plated rings around each of the top-panel's headphone sockets work with the solidly made, hefty casework to give the player a reassuring sense of luxury, too.