KEF X300A Digital Hi-Fi Speaker System

KEF X300A Digital Hi-Fi Speaker System

Free UK Delivery

In Stock


KEF X300A Digital Hi-Fi Speaker System

The KEF X300A digital hi-fi speaker system, an active design conceived to partner a PC or Mac, desktop or laptop computer. Simply connect the speakers via a ‘distortion free’ USB all-digital link to provide high resolution 96kHz/24 bit quality digital input and inter-speaker connection to ensure high definition sound from source to output.  Each speaker features twin class AB audiophile grade amplifiers inside, one for HF and one for LF/MF. Featuring high performance toroidal transformers and high quality DACs, with the X300A you don’t need to be an expert to enjoy audiophile sound quality.

High Fidelity Design

With state-of-the-art technology that’s normally reserved for high fidelity, high quality audio equipment, X300A brings an exceptionally accurate sound to your desktop. Each speaker features twin class AB amplifiers – one dedicated to high frequency (HF) signals, the other to mid and low frequencies (LF/MF). The amplifiers' power supply uses a high performance toroidal transformer to minimise hum noise and electro-magnetic interference.

High Definition Sound

Enjoy your music, movies and gaming exactly as the creators intended. Using a 96kHz/24-bit input with digital inter-speaker connection – X300A retains, from source to output, every single byte of information without loss or distortion. To avoid signal jitter, which is created by the internal digital converter in your computer, smartphone or MP3 player, X300A has its own high quality DAC. All of which means, the sound you hear is exceptionally accurate.

To get the very best from the twin class AB amplifiers, an award winning Uni-Q driver design adapted from KEF’s flagship Blade speaker is featured in the X300A.

High Simplicity

With X300A you don’t need to be an expert to enjoy audiophile sound quality. Simply connect the speakers directly to your computer (and to each other) using an all-digital USB link. Then plug them into a power source and you’re ready to enjoy a genuine hi-fi experience. X300A also includes a backup analogue input so you can connect any smartphone or MP3 player and switchable EQ modes allow you to easily optimise the sound wherever you place your speaker (on a desk, against a wall or in free space).



 System type  Two-way bass reflex
Drive units  Uni-Q driver array 
HF  25mm (1in.) vented aluminium dome 
LF/MF  130mm (5.25in.) magnesium/aluminium alloy
Frequency response (+/- 3dB)  58Hz - 28kHz 
  Frequency range (- 6dB): 49Hz - 45kHz 
Max peak SPL 104dB
Amplifier type Twin Class AB
Amplifier power LF 50W
HF 20W
AC power input AC power input
US/JP versions 100-120 VAC, 50/60 Hz
EU/UK/China versions 220-240 VAC, 50Hz
Analogue input
AUX 3.5mm stereo jack
Digital input USB 2.0: mini USB type B connector
Resolution Up to 24-bit
Sampling rate Up to 96kHz, depending on source resolution
Gunmetal Balance control, volume control
Finish Gunmetal
                Dimensions (H x W x D)                 Without heatsink: 280 x 180 x 215mm
(11.0 x 7.1 x 8.5 in.)
Dimensions (H x W x D) With heatsink: 280 x 180 x 243mm
(11.0 x 7.1 x 9.6 in.)
Weight 7.5kg (16.5lbs) per speaker


Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25

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