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KEF Gravity One Bluetooth Speaker overview

KEF (SP3900GA) Multimedia Speakers

Manufacturers Product Description

Iconic design meets exceptional acoustics Two world-renowned brands, Porsche Design, known for iconic design and KEF, acclaimed for exceptional British acoustics, have joined together to deliver an uncompromisingly luxurious Hi-Fi sound space. Bring music with you everywhere, on business trips, in boardrooms and at home. Always accompanied by high-style and high fidelity.Stylish communication A glance of the GRAVITY ONE is all you need to see the iconic Porsche Design touch. An elegant winged design crafted from a single piece of aluminium finished in titanium is set off against a deep black speaker top. This sleek styling clearly defines GRAVITY ONE as one of the Porsche Design family, while dedicated call functions and speaker controls keep it at the centre of every office and home.Musical enjoyment Small size does not have to mean a small sound. KEF's signature miniature Uni-Q driver, allows the GRAVITY ONE to project sound 360 degrees around the room, creating a complete listening experience wherever you sit. Configured back to back, its twin force-cancelling auxiliary bass radiators cancel out unwanted forces and distortion, leaving only clean and natural bass.Bluetooth® Qualcomm® aptX™ Connect to GRAVITY ONE wirelessly from compatible smart devices using Bluetooth® Qualcomm® aptX™ audio for CD-like quality sound without wires.3.5mm Aux-In Enjoy high resolution sound or connect devices without Bluetooth using the 3.5mm aux-in. Signature 'sit-anywhere' Uni-Q sound With the miniature Uni-Q driver, the midrange and treble units are mounted at precisely the same acoustic centre, delivering sound from the same point in space. This provides exceptionally wide sound dispersion for room filling, full-bodied, stunningly clear sound.Tight, clean bass Twin force-cancelling auxiliary bass radiators are configured back to back cancelling out unwanted forces and distortion. Together with a hidden port beneath each wing, they deliver tight, clean bass and a spacious sound.Dedicated music and call controls Play songs, change volume and pick up calls effortlessly with dedicated controls in easy reach.Up to 10-hour playtime Play music non-stop for up to 10 hours on a single charge. Enough for short business trips or long gatherings. Smart device power backup Plug any smart device into the available USB port for a partial charge that will keep the device running.

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General Information

Manufacturer Website Address
Brand NameKEF
Product TypeSpeaker System
ManufacturerKEF Audio
Product LinePorsche Design
Manufacturer Part NumberSP3900GA
Packaged Quantity1
Product NameGravity One Bluetooth Speaker
Product ModelGravity One

Technical Information

Featuresapt-X Technology

Battery Information

Battery RechargeableYes

Physical Characteristics

Width21.5 cm
Depth6.3 cm
Weight Approximate780 g
Height5.6 cm
ColourDeep Black
Dimensions5.6 cm (H): 21.5 cm (W): 6.3 cm (D)


  • Smart Devices
  • USB-Charged Devices


Sound System360° Circle Sound
Wireless SpeakersYes

Power Description

Power SourceUSB

Network and Communication




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