Crowd-sourced wifi network operator Fon what it describes as an the modern jukebox-- the Gramofon, a device bringing together wifi connectivity, smartphones and online music streaming services.

Essentially the Gramofon is a small router with built-in online music service support. It connects to audio systems via 3.5mm jack (it carries no speaker) and to home networks via either wifi or ethernet, and uses wifi to pair with mobile devices.

Once initial setup is complete, users log into the Gramofon's own wifi network (not Bluetooth) via Facebook account to act as streaming service playlist DJ. In addition connected devices get regular internet access.

All-climate loudspeaker maker Terra updates the look and durability of it AC series enclosure models-- now featuring aluminum grilles instead of the moulded resin from previous versions.

The grilles incorporate carefully sized micro-perforations in order to balance attractiveness and speaker protection while having minimal impact on sonic clarity.

The NAD VISO 1 wireless music system gets an update in the shape of Bluetooth aptX connectivity-- thus bringing about the NAD VISO 1 BT, an audio system promising "true" hifi performance and "incredible" sound quality.

It carries proprietary Direct Digital amplifier technology (the same inside the M2 amplifier) to provide what NAD describes as analogue-free signal processing with less distortion and enhanced digital dynamics.

Meanwhile Bluetooth aptX requires minimal setup and no wifi connections for streaming from any enabled devices.

KEF upgrades its impressive 2m tall flagship loudspeaker, the Muon, promising to take "form and function to far greater performance-levels than thought possible at the time of its introduction."

The upgrade features the latest version of the Uni-Q "point source" driver array, a combination of 5-inch MF lithium/magnesium aluminium hybrid cone and 1-inch HF aluminium dome featuring the company's "Tangerine Waveguide."

The new version uses rear air-venting to direct sound down an absorbent venting tube as it radiates from the rear of the dome. According to KEF this reduces distortion and pressures waves building behind the done for "incredibly smooth" treble.