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X300A

Quick Overview

With high resolution 96kHz/24-bit USB input and digitally connected hi-fi speakers, the X300A gives your music all the warmth, depth and detail of the original recording.
  • Features
  • Specifications
  • FAQ
  • Awards and Reviews
Features
KEF X300A

HI-FI YOUR COMPUTER

Bringing true hi-fi sound quality to the tracks you play from your computer, laptop, tablet, MP3 player or smartphone, X300A digital hi-fi speakers feature KEF's sophisticated Uni-Q array, driven by two dedicated on-board amps - one for each frequency range. With a high resolution 96kHz/24-bit USB input and simple digital speaker connection, even familiar tracks suddenly seem incomparably richer, subtler and more emotionally powerful.

HIGH FIDELITY DESIGN

Like a professional studio monitor, each X300A speaker has two dedicated class AB amplifiers - one for LF/MF and one for high frequencies – to ensure accurate, distortion-free sound reproduction. Speaker hum and electromagnetic interference are minimised by using toroidal transformers of the type specified for audiophile grade hi-fi amps. With clean USB input and digital connection between speakers, the X300A system turns your desktop, laptop, tablet or other mobile device into a source of listening pleasure to true high fidelity standards.

HIGH FIDELITY DESIGN

HIGH DEFINITION SOUND

Carrying three times more data than the audio on a normal CD, the 24-bit/96kHz USB input allows the X300A system to reproduce the full depth and complexity of high resolution music files, and with distortion-free USB connection throughout, nothing is lost from the original source. In addition, a high quality DAC in each speaker virtually eliminates interference by separating decoding from playback. All this high end technology is complemented by the award-winning Uni-Q 'point source' driver array derived from KEF's flagship speaker, the Blade. The result is a spacious, accurate and exquisitely detailed sound field, whatever device your music is played from.

KEF X300A - High Definition Sound
KEF X300A - Uni Q

HIGH SIMPLICITY

Setting up and configuring the X300A couldn’t be easier – all you have to do is connect the speakers to each other and to your chosen device by the USB ports and plug into a power source. That’s it. No software to load, no fiddly programming. A 3.5mm analogue connection is included to connect your smartphone or MP3 player.

A balance switch on the back of the master speaker allows you to optimise the sound, whether you place the speaker on the desk, against a wall or in free space.

* When your speakers are placed against a wall, you can insert the foam bung supplied into the rear reflex port for tighter, cleaner, bass performance.


HIGH SIMPLICITY


Specifications

Additional Information

Design 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 Range 49Hz - 45kHz (- 6dB)
Frequency Response 58Hz - 28kHz (+/- 3dB)
Max peak SPL 104dB
Amplifier type Twin Class AB
Recommended Amplifier Power LF: 50W
HF: 20W
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
Controls Balance control
System volume control
Internal Volume 4.7L
Power Input US/JP versions: 100-120VAC, 50/60Hz
EU/UK versions: 220-240VAC, 50Hz
China version: 220-230VAC, 50Hz
Dimensions Without heatsink:
280 x 180 x 215mm (11.0 x 7.1 x 8.5 in.)
With heatsink:
280 x 180 x 243mm (11.0 x 7.1 x 9.6 in.)
Weight 7.5kg (16.5lbs) per speaker
Unit measurement Pair
Document Download X Series Brochure
X300A Product Information Sheet
X300A Quick Start Guide
Remarks It is recommended that the X300A and X300A Wireless be used with Windows 7 and Mac OS 10.6 & above operating systems.
FAQ

Setup Recommendation

1. Follow the below settings on your computer for different operation systems to enjoy the high definition sound of X300A speakers.


For Windows XP user

  • Simply play and enjoy your music.

For Mac OS user, manually select X300A as the sound device:

  • Choose "System Preferences" from the Apple menu
  • Click "Sound"
  • Click the "Output" tab.
  • Select "KEF X300A speaker" from the device list
  • Play and enjoy your music


2. To get the highest resolution of your sound playback, you can select the default sampling rate in the computer:


For Windows Vista or 7:

  • Choose "Control Panel" from the Start menu
  • Click "Sound"
  • Click the "Playback" tab
  • Double click "KEF X300A" to go to the properties page
  • Select "Advanced", select the desired sample rate under "Default Format"

For Mac OS user, manually select X300A as the sound device:

  • Choose "System Preferences" from the Apple menu
  • Click "Sound"
  • Click the "Output" tab.
  • Select "KEF X300A speaker" from the device list
  • Play and enjoy your music

For Windows XP:

  • Choose "Control Panel" from the Start menu
  • Click "Sounds and Audio Device"
  • Click the "Audio" tab
  • Click "Advanced" under "Default device"
  • Click the "Performance" tab
  • Select "Best" for "Sample rate conversion quality"

For Mac OS X:

  • Choose "Utilities"
  • Choose "Applications"
  • Click "Audio MIDI Setup"
  • Select "KEF X300A"
  • Select the desired sample rate under "Format"

Playback of files with sample rate higher than 96kHz will be down-sampled to 96kHz.

Power

X300A does not turn on


  • Ensure that your main power supply has been turned on.
  • Ensure the X300A has been powered on.
  • Try to reconnect power cords to speakers and mains socket respectively.


Sound

No sound (Right speaker) Blinking green light

Please refer to the section "Error Signal" > "Blinking green light"

No sound (Right speaker) Solid green light


  • Play music source which contains both left and right channel signals.
  • Make sure the USB/3.5mm stereo cable is properly connected to the source.
  • Adjust the Balance knob until sound is output on both speakers.

No sound (both speakers) Solid green light


  • Make sure the USB cable to computer has been disconnected when playing the AUX IN source.
  • Make sure the USB/3.5mm stereo cable is properly connected.
  • Make sure your computer and/or media player are not muted.
  • Increase the volume on system gain control and computer.

For Mac OS user, manually select X300A as the sound device:

  • Choose "System Preferences" from the Apple menu
  • Click "Sound"
  • Click the "Output" tab.
  • Select "KEF X300A speaker" from the device list
  • Play and enjoy your music

For Windows XP user:

  • Increase the volume of both Windows and media player to the maximum.
  • If you are using the iTunes, restart iTunes after applying new setting on the sound output.
  • If you have sound control software installed in your Windows, the software may take control of the sound output selection of your computer. Select "KEF X300A Speaker" manually as your default speaker.

For Windows Vista or 7:

  • Choose "Control Panel" from the Start menu
  • Click "Sound"
  • Click the "Playback" tab
  • Check if "KEF X300A Speaker" is selected as the default speaker. If not, right click "KEF X300A Speaker" and select "Set as Default Device"

For Windows XP:

  • Choose "Control Panel" from the Start menu
  • Click "Sounds and Audio Device"
  • Click the "Audio" tab
  • Check if "KEF X300A Speaker" is selected under "Default device". If not, select "KEF X300A Speaker" as "Default device"

If the problem persists, please refer to the user's guide of your sound control software.

  • Your media player may take control of the sound output selection of your computer. Please refer to the user's guide of your media player for sound output setting.
  • Disconnect and connect the USB/3.5mm stereo cable again.
  • Power off the speakers, then power on.
  • If the problem persists, please contact your local dealer or service help desk.

No sound (both speakers) Solid red light

Speakers in standby mode. Check if the USB/ 3.5mm stereo cable is properly connected.

No sound (both speakers) Blinking red light

Please refer to the section "Error Signal" > "Blinking red light"

No sound (both speakers) No light

    Make sure all power cords are plugged and the main power supply is turned on.

    Intermittent playback

    Streaming online resources may result in intermitent sound output due to unstable network signal. Playing local music files in your computer is recommended. System sound may interrupt music playback. It is recommended to disable the system sound. Make sure all cables are properly connected. Replace any damaged USB/3.5mm stereo cable.

    For Windows:

    • Choose "Control Panel" from the Start menu
    • Click "Sound"
    • Click the "Sounds" tab
    • Select "No Sounds" under “Sound Scheme", then click "Ok"

    For Mac OS:

    • Choose "System Preferences" from the Apple menu
    • Click "Sound"
    • Click the "Sound Effects" tab
    • Uncheck "Play user interface sound effects"

    Sound fades out

    Power off the speakers and power on again after 15 minutes.

    Playback without desired resolution

    Manually select the default sampling rate in the computer.

    For Windows Vista and 7:


    • Choose "Control Panel" from the Start menu
    • Click "Sound"
    • Click the "Playback" tab
    • Double click "KEF X300A" to go to the properties page
    • Select "Advanced", select the desired sample rate uder "Default Format"

    For Windows XP:


    • Choose "Control Panel" from the Start menu
    • Click "Sounds and Audio Device"
    • Click the "Audio" tab
    • Click "Advanced" under "Default device"
    • Click the "Performance" tab
    • Select "Best" for "Sample rate conversion quality"

    For Mac OS X:


    • Choose "Utilities"
    • Choose "Applications"
    • Click "Audio MIDI Setup"
    • Seletct "KEF X300A"
    • Select the desired sample rate under "Format"

    Playback of files with sample rate higher than 96kHz will be down-sampled to 96kHz

    Control

    No response (System gain)


    • For Windows XP user, increase the volume settings on both Windows and your media player to maximum.
    • Increase the volume on the computer and media player.
    • If the problem persists, please contact your local dealer or service help desk.

    No response (Balance)


    • Make sure the sound setting of your computer and media player is balanced.
    • If the problem persists, please contact your local dealer or service help desk.


    Error Signal

    Blinking red light


    • Power off the speakers and power on again after 15 minutes.
    • If the problem persists, please contact your local dealer or service help desk.

    Blinking green light


    • Make sure the Left and Right speakers are properly connected through the USB cable.
    • Make sure the Right speaker has been powered on.
    • Disconnect and re-connect the USB cord between Left and Right speakers.
    • Power off the speakers and power on again.
    • If the problem persists, please contact your local dealer or service help desk.



Awards and Reviews


COMPUTEX d&i Awards 2014
Year: 2013
Magazine / Issuing Body: Sound+Image Awards 2014
Country: Australia
Product: X300A



Hifi Vidéo Home Cinéma
Year: 2013
Magazine / Issuing Body: Sound+Image Awards 2014
Country: France
Product: X300A



Review: X300A - PCMagazine
"The Best Products of 2013." – PC SPEAKERS
Year: 2013
Magazine / Issuing Body: PCMagazine
Country: USA
Product: X300A



Review: X300A - MSN Tech
"They can be cranked up to extreme volume without offering the slightest distortion, making them perfect for unleashing tracks that demand to be played at 11."
Year: 2013
Magazine / Issuing Body: MSN Tech
Country: United Kingdom
Product: X300A



CHOC CLASSICA AWARD
Year: 2013
Magazine / Issuing Body: MAGAZINE CLASSICA
Country: France
Product: X300A



EDITORS’ CHOICE AWARD
"The KEF X300A isn't inexpensive by any means, but for a powered desktop speaker system in this price range, it's as close to perfect as we've heard—and a clear Editors' Choice."
Year: 2013
Magazine / Issuing Body: PCMagazine
Country: USA
Product: X300A



10 Best Desktop Speakers
"Best Audiophile Speakers: ...The gunmetal, gray-vinyl finish gives the X300A a luxury feel that matches its near-a-grand price tag. That's 50 years of groundbreaking audio engineering for you."
Year: 2013
Magazine / Issuing Body: Gear Patrol
Country: USA
Product: X300A



EDITORS'CHOICE AWARD
"Let's not beat around the bush: The KEF X300As are one of the most thrillingly enjoyable speaker systems we've heard in quite some time."
Year: 2013
Magazine / Issuing Body: Digital Trends
Country: USA
Product: X300A



Review : X300A - Digital Audio Review 06/2013
"By keeping their first foray in digital audio a 'no compromise' affair, KEF has freed us from the tyranny of choice. Their X300A is a set menu system – entree, main and dessert – and it is truly delicious."
Year: 2013
Magazine / Issuing Body: Digital Audio Review
Country: Australia
Product: X300A



QOBUZISSIME
"Avec le modèle X300A qu'elle vient de présenter, la marque Kef vient encore de prendre une longueur d'avance sur la concurrence..."
Year: 2013
Magazine / Issuing Body: QOBUZ
Country: France
Product: X300A
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