KEF Reference Series Model 101 Bookshelf Speakers

Made In England



KEF Model 101 is a truly outstanding product of modern loudspeaker technology. Although small in overall dimensions and simple appearance. Model 101 contains one of the most advanced sound reproduction systems ever developed and achieves a standard of acoustic performance superior to that of many for larger loudspeakers.


Model 101 is a loudspeakers of Reference quality which will satisfy the professional user and enthusiast whose amplifier and related equipment are of the highest standard, but who require small, unobtrusive loudspeakers.


Model 101 offers many advantages over larger models where space is restricted as the systems are easily located to give excellent tonal balance and sharp,clear stereo images. Novel and precise production methods guarantee the frequency response within fine limits resulting in stereo reproduction of outstanding perspective and sharpness




Model 101 combined the T27 tweeter with the SP1057 version of the B110 in a 6.7 litre closed box. The system was fully overload protected by the S-Stop system, included mechanical decoupling of the bass driver to minimize colouration and each pair were acoustically matched to within 0.5dB. The result was a system with accurate tonal balance and detailed stereo imaging - being suitable for use with the best electronics - and able to fit unobtrusively into the listening room.


Features
Flat frequency response to 90 Hz (-10 dB at 47 Hz)
Two way system with minimum interunit time deley
Pairing of systems guarantees sensitivity and frequency response match to within 0,5 dB
Fully protected against fault conditions when used with amplifiers up to 100 watts
Electronic protection -S-Stop protects against overload and fault conditions




The laws of physics dictate that a small enclosure must either give less bass or have lower efficiency. To achieve a balance response in the design of Model 101, KEF use a tonal system design approach so that the drive units, filter networks and enclosures are developed together to achieve the broadcast band width with the optimum efficiency.
The close tolerances needed to realise the full potential of the design are maintained in production by a unique matching procedure so that every pair of Model 101's is matched in frequency response to within 1dB of the original laboratory prototypes.
The widespread use of high powered amplifiers which can deliver the full dynamic range captured with modern recording techniques, has made it necessary to protect loudspeakers against accidental overload.


In Model 101 a self-powered electronic circuit called S-Stop, protects the loudspeakers from the effects of overload and automatically re-connects the full input signal to the system only when the overload is removed.
To allow the sound to reach the listener directly without troublesome reflections from walls, floor or ceiling the drive units are arranged within the 7 litre enclosure so that the full frequency response is enjoyed when the loudspeakers are positioned approximately 75 mm from the floor.
An optional stand, the ULS 20, allows the speaker to be conveniently and elegantly converted to a free standing system.



Specification: Model 101
System type: Two-way, bookshelf/stand-mount
Enclosure type: Closed box
Input Impedance: 8 ohms
Rated maximum power: 100 W programme
Amplifier Requirements: 20 - 100 watts per channel into 8 ohms
Frequency response: 90 - 30,000 Hz ±2 dB at 2m on measuring axis (-10dB at 47Hz and 40kHz)
Sensitivity: 81 dB at 1m for a pink noise input of 1W
Distortion (Measured at 1m on measuring axis at mean spl of 90 dB, anechoic conditions):
Second Harmonic : less than 1% from 120 Hz to 20 kHz
Third Harmonic : less than 1% from 70 Hz to 20 kHz
Directional Characteristics:
Horizontal : within ±2 dB of axial response up to 20 kHz for ±20°
Vertical : within ±2 dB of axial response up to 20 kHz for ±5°
Crossover Frequencies: 400, 2500 Hz
Maximum output: 100 dB on programme peaks under typical listening conditions
Finishes: teak
Grille: Black cloth
Size: 340 x 180 x 190 mm (13.4 x 7.1 x 7.5 inches)
Weight: 5.6 kg (12.3 lb)
System: SP1122
Drive units: B110 bass/midrange unit (SP1057), T27 tweeter (SP1032)
Crossover: SP1123 and SP1124 (SP2010 from 1983)



User Review for reference:
Sometime later I had the opportunity to buy a pair of KEF reference 101, which were made from the end of the seventies.
These speakers are really small, so I didn't expect much weight in the bass and I expected a sound that was thin sounding.
Well, I was really surprised with the overall sound of the speaker. Although it has the same type of drivers, its sound is totally different.
The soundstage is enormous and the sound is so airy. The sound doesn't come from the speakers, but hangs beautiful around the speakers and creates a beautiful stereo image.
I can understand that some people say they like the T27 tweeter more than the later Uni-Q tweeters. It seems like the tweeter sound goes a bit further than with the uni-q, the latter which sometimes can have a restricted top end.
No aggressive sound in the high, beautifully detailed and yet with ease and very relaxing.
The mid-low and low are phenomenal. This speaker can create a total sound that is complete without missing some important frequencies. The sound is warm, though I can't detect any colouration. And that's strange. A speaker of this size and with this overall grown up sound must add some colouration. And probably it will, but it has been done in such a way that I can't hear it. The mid and mid-low is clean, detailed and still warm.
It's amazing how a piano sounds on these speakers. No thin, metal like sound, but a very clean piano sound with a good low extension. Not a metallic sound with too less wood sounds, but a complete sound with the right amount of wood and metal sound in it (if the recording is OK).
Voices are projected in a stunning way. This speaker has the ability to let the music hear with all its intimacy. These speakers connect you to the music.

There are lots of small speakers this size that are very revealing and have a complete neutral and not exciting sound. Not for the Kefs 101. They are revealing, but they do it in a very musical way. They sound very even with no peaks or dropouts in high, mid and low register. The transparency is enormous and these speakers will bring you closer to the musical event. The atmosphere of the recording is being projected to the listener and this gives the speaker its intimacy
I can't say any negative about this speaker. On both the high, mid and low registers it performs great with no audible compromises.
I can only say positive things. One of those things is that the moment you listen to these speakers, it's hard to believe that the sound you are hearing is really coming from these tiny speakers.
Fully recommended!


Price : RM 2850

Contact : Simon Ting 012-3612507

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