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KEF

X300A

Šifra Proizvoda: 8939

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799 €

Dostupnost:

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Kratak opis

KEF X300A 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.

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Raymond Cooke (BBC inžinjer elektronike, tehnicki direktor Wharfedale-a) i poslovni saradnici, osnovali su kompaniju KEF Electronics Ltd., sa namerom da prave ino- vativne zvucnike koristeci najnovije mate-rijale i tehnologije. Osnovana je u Kentu 1961. godine, na imanju nekadašnje kompa-nije “Kent Inžinjerstva i Livnice (Kent Engineering and Foundary)” odakle je “KEF” i dobio ime.

Zahvaljujuci stalnom eksperimentisanju sa novim materijalima i tehnologijama KEF zvucnici su uvek imali fantasticna akusticna merenja i mogli su da reprodukuju snimke najbliže moguce originalnom zvuku u studiju ili nastupu uživo. Od pocetka, kao i danas, KEFova inovativnost i kvalitet su neosporni, tako da više od pola veka unazad audiofili širom sveta uživaju u ovim zvucnicima visokih perfomansi.

 

 

 

 

Hi-Fi Your Computer 

Featuring KEF’s state-of-the-art Uni-Q driver, supported by two amplifiers in each unit, the X300A is a true audiophile speaker for your PC, Mac, MP3 player or smartphone. Enjoy true high definition sound from source to output.

Just connect, power and play.

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).

KEF X300A

Introducing 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.

KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.

 

High Fidelity Design

Innovation is what sets KEF apart from its competitors. For over 50 years KEF has been at the forefront of loudspeaker research and development, designing class-leading speakers that have dealt with the challenges of reproducing the latest musical formats, and reproducing them to the highest possible quality. The X300A continues this legacy today.

The X300A speaker is a premium active design conceived to offer the highest resolution music reproduction from a PC or Mac, desktop or laptop computer – all via a ‘distortion free’ USB digital input. There is even a backup analogue input with its own level control so you can easily connect any smartphone or MP3 player.

Unlike typical active computer speaker designs the X300A utilises twin class AB audiophile grade amplifiers featuring high performance toroidal transformers to minimise hum noise and electromagnetic interference, in keeping with the best pro audio monitors available today. This means that because each driver has an amplifier delivering its own power, the tweeters (vented designs to help lower distortion) are not affected when the woofer amps are driven close to the limit, resulting in a much cleaner sound and greater control at higher levels.

High Definition Sound

Digital USB input and inter-speaker connections provide lossless high resolution 96kHz/24 bit quality sound from source to output. This is in addition to high quality audiophile DACs (a dedicated DAC inside each speaker) with an asynchronous USB mode, which means that when you connect up the X300A into your PC or laptop, you’ll by-pass the computer’s internal DAC and make use of the high quality DAC in the X300A. The result is that whatever source your music is coming from, whether it’s your phone, MP3 player or computer, the X300A will deliver accurate, high resolution playback.

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.

The Uni-Q driver array uses an extremely light and rigid aluminium/magnesium cone designed to deliver fast and clean mid-range. With the aluminium tweeter, featuring KEF’s ‘Tangerine waveguide’ placed at the acoustic centre of the cone for optimum performance, not only will it increase dispersion and reduce the traditional ‘sweet spot effect’ making placement easy, but it’ll reproduce upper registers with startling clarity, smoothing the transition to midrange frequencies and reproducing your music with flawless accuracy.

With other innovations such as the Z-flex surround for a smooth transition between cone and cabinet and large neodymium magnets with copper caps to reduce inductance and distortion, the Uni-Q driver array developed for the X300A will provide a wide, clean and detailed sound field whatever source your music is coming from.

High Simplicity

Setting up and configuring the X300A could not be more straightforward with simple to connect ‘plug and play’ connections using an all-digital USB link. A backup 3.5mm analogue connection makes connecting smartphones or MP3 players easy, and switchable EQ modes make positioning on desk, free space or desk/wall placement possible; the sound being optimised specifically for whichever position the X300A is placed. Desk and free space modes are selected by a switch on the rear panel of the master speaker, desk/wall mode is chosen via a foam plug for the rear mounted reflex port.

The X300A offers a highly flexible and versatile speaker solution that delivers high resolution sound from source to output. Available in a gunmetal finish, the X300A will reproduce music with startling realism regardless of whether the source is a computer, smartphone or MP3 player.

 

 
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 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
Resolution
Sampling rate
USB 2.0: mini USB type B connector
Up to 24-bit
Up to 96kHz, depending on source resolution
Controls Balance control
System volume control
Internal volume 4.7 l
Finish Gunmetal
Dimension
(H x W x D)
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
It is recommended that the X300A be used with Windows 7 and Mac OS 10.6 & above operating systems.

 

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
• Visit the Digital Trends site for full review
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
• Visit the Digital Audio Review site for full review
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
• Visit the QOBUZ site for full review

 

"These KEFs have a solid sound that adds real weight to music, yet they keep acoustically neutral with barely any coloration from the box or electronics. A majestic achievement."  

– KEF X300A, Macworld.co.uk, November 2013

 

KEF X300A Review Date August 15, 2013
 
  • Amazing sound quality. Beautifully crafted. USB connection ensures top-notch audio without needing a separate digital-to-analog converter.

  • Cons Very expensive. No provision for adding a subwoofer.
  • Bottom Line

    KEF has struck gold with the X300A, a high-resolution active desktop speaker system that sounds amazing when connected to any computer.

By Jamie Lendino

If you're an audiophile with the means, you'll do well to look at the KEF X300A ($799.99 direct). It's an ideal pair of speakers for an apartment, office, or study, and it includes a digital USB connection for improved, all-digital sound when connected to a PC or Mac, bypassing your computer's internal sound chipset in the process. There's no wireless Bluetooth or AirPlay support, although you can plug in an iPad, Android device, or other mobile gadget using the 3.5mm auxiliary input, and you can also connect the X300A to an Apple AirPort Express ($99) for wireless listening from AirPlay-compatible devices. 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.

 

Design and Setup
Even if you didn't see the price tag, there's no chance the KEF X300A£678.17 at Thomann will be mistaken for an inexpensive speaker system. Each robust X300A enclosure measures 11 by 7.1 by 8.5 inches (HWD) and weighs a solid 16.5 pounds. They come in a snazzy textured dark gray finish with rounded edges, along with a matte black front panel. The rear of each enclosure features a prominent heat sink that adds another 1.1 inches to the depth figure, for a total of 9.6 inches.

The X300A is a two-way bass reflex design with a 5.25-inch magnesium and aluminum alloy woofer and a 1-inch vented aluminum dome tweeter. The wide-dispersion Uni-Q driver array, with the tweeter positioned in the center of the woofer cone, is a classic KEF trademark and similar to the one in KEF's $30,000 Blade system. There are no speaker grilles, so the driver array is always on full display, and in my opinion at least, it looks really sharp.

Each speaker has its own grounded AC power outlet and cord; you'll need two wall outlets to power the X300A, just like you would with active studio monitor speakers like the M-Audio BX5 D2$299.95 at zZounds. The left speaker contains the main volume control knob, but it's on the back and difficult to reach. To control volume on a day-to-day basis, you're supposed to use the software volume control that's built into your PC or Mac. Also on the back panel is a switch that selects between "desk" and "stand" (or free space) placement, and KEF provides a pair of baffles in the box you can use to plug up the rear-facing ports if you plan on positioning the speakers close to a wall.

KEF X300A

The built-in USB connection is fairly novel. While speakers have been doing that for a little over a decade now—the original version of what is now the Harman Kardon SoundSticks III$169.95 at Harman Kardon had this type of connection—it still makes sense if you want the best possible sound quality, especially thanks to the X300A's 96kHz/24-bit digital-to-analog (D/A) converter.

The package actually includes two mini-USB-to-USB cables; one connects the two speakers to each other, while the other connects the left speaker to your computer's USB port. Once you've made these two connections, plug both speakers into the wall, power up the left speaker using the switch on the back, and you're ready to go. A standby mode kicks in whenever the speaker hasn't been used for more than a few minutes, which helps keep your power bills down.

Our test Apple iMac 27-inch$1,849.99 at B&H Photo-Video computer recognized the X300A immediately, both for default audio listening in iTunes, and for monitoring recording in Logic Pro X. For the latter, I found I had to turn off the speakers to re-enable headphone listening, which then caused Logic to reload my current project, as it treated the X300A like a new audio interface; not a big deal, but something to give thought to if you're thinking of using the KEF X300A as a pair of studio monitors. I also tested the X300A with a Lenovo ThinkPad laptop running Windows 7; the system recognized the X300A and installed drivers on its own, and everything played perfectly as a result.

Performance and Conclusions
Each X300A speaker includes twin class-AB amplifiers: a 20-watt unit for the tweeter and a 50-watt amp for the magnesium woofer, as well as the aforementioned DAC. KEF rates the X300A at 58Hz to 28kHz, plus or minus 3dB, and 49Hz to 45kHz, plus or minus 6dB. That -6dB point is pretty good for a small bookshelf speaker, and KEF claims a maximum output level of 104dB. Unfortunately, there's no way to add a powered subwoofer to the system, but chances are you won't miss it unless you're watching blockbuster movies or playing games on your PC.

In a variety of music listening tests, the X300As sound exemplary. The best part about the sound is the smoothness in the high-mids. Other parts of the frequency spectrum also sound great, but there's something about the immediacy and level of detail you hear in the X300A that's beguiling, and that shows up the limitations in the crossover region you'll hear on lesser speakers. For example, in Ani DiFranco's "Knuckle Down," you get every last noise on the acoustic guitar strings from her pick work, with a palpable sense of the guitar's body that can get lost on speakers that stumble on all of the treble information.

KEF X300A

Whenever you hear a speaker like this, with its bright, clear presentation, you might worry that the tweeters will sear your ears off on hard rock or metal music, but that's not what happens here at all. With Rage Against the Machine's "Fistful of Steel," the X300A delivered punchy, energetic guitars and super-smooth hi-hats and crash cymbals. You could say the X300A's frequency response curve leans a bit bright, but it's never unpleasant. Still, perhaps as a result, the X300A does particularly well with classical music, such as John Adams' "The Chairman Dances," which is full of high strings and brass that really show off the X300A's high-resolution midrange and treble performance.

Imogen Heap's "Headlock" is another showpiece for these speakers, with its warm-sounding cello, sparkling electronic synths, occasional deep bass notes, and beautiful, breathy vocals. Flunk's "Indian Rope Trick," an electronic chill-out track, sounded bright and airy—perhaps a bit too much so, albeit without any trace of harshness. I also listened to Depeche Mode's "Suffer Well," which through the X300A exhibited a kick drum, while not as deep as I've heard on systems with a powered subwoofer, was still plenty strong. In all cases, it's easy hear the difference the pristine digital connection and built-in D/A converters affords, compared with, say, the inferior 3.5mm input analog jack on a low-end PC laptop.

You're going to have a tough time finding a powered speaker system better than the X300A at this price. Our favorite 2.1 system, the Paradigm Millennia CT, costs $100 less and has the deep, almost subterranean bass extension you get with a proper powered subwoofer, but lacks the all-important digital connection and easier placement you get with the X300A. The Audioengine 5+$399.99 at Crutchfield, meanwhile, offers much of the same excellent performance, although it's not quite as refined-sounding, and it lacks a digital USB connection. The M-Audio AV 40$159.99 at OWC is the least expensive speaker I'd recommend in this 2.0 configuration, but it doesn't approach the detail or sheer output power of the X300A. All told, for its thrilling and uncolored sound, without the placement and crossover complexities of a 2.1 system, and with a pure digital connection, the X300A is our new Editors' Choice for desktop PC speakers.

 

Download

  • X300A Product Information Sheet

  • X300A Quick Start Guide
 
  • X300A Brochure

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