KEF R 900 in the Test

The new R-series from KEF acts with their clear design much matter-of-fact and timeless as the predecessor. Sounds like the top model R 900?

  1. KEF R 900 in the test
  2. Data sheet

Some brands are setting trends, others lag behind them. KEF is clearly one of the former species. The once purely British, now British Chinese manufacturer has invented not only the UniQ coax, but often also in the design set standards.

Unforgettable the oval bass diaphragms of the 80s are the distinctive mark of KEF, temporarily. Or 2002 the then brand new reference series with their elegantly rounded enclosures, which were later also in the low-cost series.

Many were even more astonished, when earlier this year the new Q-Series on the market (test in stereoplay 1/2011), this time without any curves. Now connect the R models in the footsteps of the so-called XQ series – and repeat the paradigm shift. Their cases are strictly rectangular, whereas at XQ itself, lid and base had a RADIUS.

What I like better, is a matter of taste as always. But timeless is always the R-design. The surfaces are kept in gloss lacquer or real wood in black piano lacquer, walnut or rosewood. The example of the big R 900, our test will clarify what has happened technically and how it stands for the Sonic talent. The chassis is very different from the drivers of the XQ series, which has itself little more than three years under his belt. The new UniQ is the the brand new Super box blade, which is about the same time on the market except for things.

The similarity is amazing, because the noble blade with 24000 euros per couple price is playing in a completely different League. Even the R 900 top model R series is affordable with 3600 Euro multiples. The new 5-inch coaxial system denies in the 900 complete medium – and high-frequency range above by 400 hertz to about the audibility.

The idea itself is unchanged for over 20 years: two chassis of sizes are so intertwined that the distances to the receiver are always the same, no matter where are measurement microphone or handset find a.

Translated in the time level, this means that all frequencies relevant to locating and tones – the middle and high are now time – simultaneously arrive. Broadband signals, as they are in the music of the day, be falsified as a result across much less over all space angle in their temporal structure, than would ever be possible with separate chassis.

The UniQ from the blade

In the redesign of the membranes, suspensions and diffuser lenses again perfected the sound so important angle behavior compared to previous generations. The same applies to the crosstalk between the units reciprocal sound ducts and neighboring magnetic fields.

The result was a fairly flat cone membrane made of aluminium and magnesium, as well as some highly visible stiffening ribs. The border area to the outer suspension and further to the baffle as well as inward to the tweeter is shaped so that no abnormalities in sound pressure or angle behavior arise even in transition at about 3 kilohertz. For ear or measurement microphone, two way system therefore resembles a wide bands with variable frequency diaphragm size.

Compared with previous generations, the spherical membrane of the tweeter has been stiffened and can follow more precisely such impulses. The midrange was a voice coil with a very large diameter, which ensures high load capacity. The usage shows that KEF trust very much to his new forward pointing chassis, in the blade where the Petite four ultra-modern 9-inch bass driver is faced, which present an enormous bass and fundamental dynamics.

The R 900 is equipped with Two 8-inch “only”, here too the design in itself. The chassis have inverse, curved to the inside suspensions of edge of the and membranes from pulp and aluminium. The lush-sized drives are many ventilated and bred on signal integrity.

There are surprisingly few parallels to the Q-series. There, the UniQ systems cover also the bass even if the boxes have separate woofer. In the Q-series are the coaxial systems so long stroke side and vary with the box size in diameter between 5 and 8 inches.

In the R-series, the spotlights are always 5 inches tall and high pass filter on the larger models between 400 and 500 Hertz, what reduces the lifting movements of the outer membrane and relieves the vibrating systems.

But so not enough: While the standing speakers of Q Series use passive membranes, to emphatically overcome deepest frequencies, most of the R models bass reflex tubes use. 900 at the R lead this quadruple design on the back.

What does the R 900 sound? First of all, 900 as a sparring partner had to join the Q; it comes much cheaper with 1600 euro per pair. When the powerful 90-years Ohrenputzer “Hedonism” by Skunk Anansie, the Q 900 could live out their exuberant joy of playing and once again underline why she so perfectly is in the class up to 2000 euro.

Complex sound picture

R 900 countered with greater ink density and remained at low and medium frequencies in those flagrantly out complex sections still super tight, where the smaller sister began to waft easily. Fascinating, that the greater wealth of detail was not accompanied by the feeling of higher effort – on the contrary: more transparency sounded relaxed despite much the R 900 and price involved all in all much less after speaker than the still outstanding Q 900.

The next hurdle was ready with the Heco Celan GT 902 for 2200 euros, this time the R had the winner from German boxing comparison in issue 10/2011 900 more to argue, because the Heco threw, not to expect their exceptional Dynamics skills to bear.

The blisteringly fast and bass-heavy Yello- blockbuster “The Race” (stereoplay CD Edition 1/2010) the Heco mastered so brilliantly that you could think of the listening room is a professionally equipped recording studio and the musicians are just a few metres away.

However, the KEF equipped with slightly less surface revealed the exact bound bass as well as the again greater impulse joy – what provoked all conceivable sense impressions between irritation and Rapture in the jury.

How the KEF of Heco’s larger coarse dynamic could match wits, was a surprise. The other was of even greater abandon of R 900. Added: about this speaker subtleties were heard which could only indicate the Heco.

Another boxing star entered the hearing room with the 600 euros more expensive Naim Ovator 400 S. A walkover, failed the KEF this time but a duel at eye level.

The intricate bass runs and percussion threads of Safri duo in “Samb Adagio” KEF gave more power and authority, for the Naim sounded somewhat complaisant and smoother. Staffelten both boxes very carefully and to finally reach the same number of sound points. In short: The R 900 sounds for their money simply sensational.

KEF R 900

Manufacturer KEF
Price €3600.00
Rating 59.0 points
Test procedure 1.0

Technical data and test results

General data
Width 24.0 cm
Height 113.0 cm
Depth 36.5 cm
Weight: 29.5 kg
Installation tip: free standing, distance 2 m, normal damped rooms from 30 m ²
Measured values
Operating voltage for 90 dB SPL 3.6 V
Impedance minimum stp 3.5 ohms
Maximum volume upper value 105 dB
Maximum volume lower value (> 45 Hz) 105 dB
Lower cut-off frequency (-3dB) 10 Hz
Lower cut-off frequency (-6 dB) 10 Hz
Review
Short conclusion Clean rectangular Standbox\r\nmit enclosures in real wood oder\r\nHochglanzlack and UniQ-Koax\r\naus of the Nobel box Blade.\r\nDas top model of the neuen\r\nR series sounds so full of detail wie\r\nkörperhaft and musikalisch.\r\nEin dream in every respect!
Sound Absolute top class
Naturalness 12
Fine resolution 12
Border dynamics 11
Bass quality 12
Figure 12
Sound points (70 points) 59
Measured values 8
Practice 5
Valency 8
Overall rating (max. 120 points) very good 80
Price / performance outstanding
tested in output 11 / 11

 

Gallery

Test Lautsprecher Stereo – KEF R900 – sehr gut

Test Lautsprecher Stereo - KEF R900 - sehr gut

Source: www.hifitest.de

KEF R 900 La Paire

KEF R 900 La Paire

Source: www.hificine.com

KEF R 900 La Paire

KEF R 900 La Paire

Source: www.hificine.com

KEF R900

KEF R900

Source: www.snyggtljud.se

KEF R900 – 壱百弐拾倶楽部

KEF R900 – 壱百弐拾倶楽部

Source: 120club.ge3.jp

Diffusori acustici 3 vie HiFi Kef R900

Diffusori acustici 3 vie HiFi Kef R900

Source: www.audiostoreservice.it

Technik KEF R900 – Uni-Q Koax-Treiber

Technik KEF R900 - Uni-Q Koax-Treiber

Source: www.fairaudio.de

Test: KEF R900 – Lautsprecher

Test: KEF R900 - Lautsprecher

Source: www.fairaudio.de

KEF R900 Staande Speaker

KEF R900 Staande Speaker

Source: www.besteproduct.nl

KEF R 900 álló hangsugárzó KEF

KEF R 900 álló hangsugárzó KEF

Source: www.streamaudio.hu

KEF R900 Loudspeakers

KEF R900 Loudspeakers

Source: www.ultrahighendreview.com

Test Lautsprecher Surround – KEF R900-Serie (5.1)

Test Lautsprecher Surround - KEF R900-Serie (5.1)

Source: www.hifitest.de

Test-Fazit: KEF R900

Test-Fazit: KEF R900

Source: www.fairaudio.de

KEF R900 플로어스탠딩형 스피커

KEF R900 플로어스탠딩형 스피커

Source: kr.kef.com

KEF R900

KEF R900

Source: studiohifi.pl

KEF R 900 im Test

KEF R 900 im Test

Source: www.connect.de

Test: KEF R900 – Lautsprecher

Test: KEF R900 - Lautsprecher

Source: www.fairaudio.de

KEF R900

KEF R900

Source: www.homecinema-bg.com

KEF R 900 La Paire

KEF R 900 La Paire

Source: www.hificine.com

Klang KEF R 900

Klang KEF R 900

Source: www.fairaudio.de

KEF R900 im Test Testberichte.de-∅-Note: 1,3

KEF R900 im Test Testberichte.de-∅-Note: 1,3

Source: www.testberichte.de

Kef R 900

Kef R 900

Source: www.ilcentrodellamusica.com

Kef R900 Floorstanding Speakers

Kef R900 Floorstanding Speakers

Source: www.themovierooms.co.uk

KEF R 900 im Test

KEF R 900 im Test

Source: www.connect.de

Technik KEF R900 – Uni-Q Koax-Treiber

Technik KEF R900 - Uni-Q Koax-Treiber

Source: www.fairaudio.de

KEF R900 Floor Standing Speakers (Pair)

KEF R900 Floor Standing Speakers (Pair)

Source: www.superfi.co.uk

Ekte highend-høyttalere på billigsalg

Ekte highend-høyttalere på billigsalg

Source: www.tu.no

KEF R900 – LE HO PROVATE, E ADESSO?

KEF R900 – LE HO PROVATE, E ADESSO?

Source: cavihifi.wordpress.com

KEF R900 Home Theater Speaker System Page 2

KEF R900 Home Theater Speaker System Page 2

Source: www.soundandvision.com

Pin Kef R900 51 Speaker Package At Audio Affair on Pinterest

Pin Kef R900 51 Speaker Package At Audio Affair on Pinterest

Source: www.picstopin.com