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Article Index
Tannoy Kensington GR
page 2
page 3 - Sound Quality
page 4 - Conclusion
page 5 - Measured Performance
All Pages




MEASURED PERFORMANCE
Our frequency response analysis shows the Kensington GR measures flat across most of the audio band, so it is fundamentally accurate. Bass peaks up at 55Hz by +8dB, but a higher definition mls analysis shows this is a narrow band effect that doesn’t encompass much energy so it will be less audible than might be expected. All, the same, it does mean the Kensington GR is not lacking bass and, at this frequency, a boost to subjective speed is provided. The forward firing side ports, concealed in the hardwood edge trims, provide a little support (+2dB at 80Hz) to lower frequencies. All the same, although the Kensington is big and produced loud bass cleanly, it does not produce sub-sonics, cutting off sharply below 40Hz. Our impedance plot adds further to the picture, showing narrow damping of the basic cone/cabinet resonance at 55Hz.
    Upper treble rolls down slowly with the front adjustment screws for treble Energy and Roll-off set ‘Level’. Roll-off had little affect, reducing upper treble (above 10kHz) by a few dB. The Energy screw had most affect, and when set to +2dB raised output of the concentric horn-loaded treble unit by +2dB or so above 3kHz, enough to audibly brighten the sound, but not in a gross fashion.
    The treble horn integrates smoothly with the bass/midrange unit at all angles off-axis, laterally and vertically because  of concentricity. The pepperpot waveguide keeps response smooth on-axis and off-axis too. Smooth off-axis results mean the Kensingtons do not have to be toed in.
    A 200mS decay analysis interestingly showed very low coloration from 20kHz down to 200Hz. Below 200Hz the Kensington GR becomes a tad ‘hot’ and predictably has a resonance and associated overhang at 55Hz, but it is less ‘hot’ than smaller cabinets all the same. Overall, decay analysis shows a very clean result, and a low coloration ‘speaker.
    Sensitivity measured 91dB from one nominal Watt of input (2.8V), so the Kensington GRs need just a few Watts to go very loud and 40 Watt amplifiers are more than adequate to drive them very loud, in large rooms. As a load they measured 6 Ohms and have a minimum DCR of 5.7 Ohms so sensitivity is not gained by low-loading a constant current source, meaning the Kensington GRs are efficient and don’t load an amplifier heavily.
    The Kensington GR offers a very typical Tannoy measured performance, with a smooth and accurate audio response, plus a slow roll-off in high treble to ensure an easy sound lacking ‘sting’. Bass will have speed and weight, without being overblown. NK

 

FREQUENCY RESPONSE

 

IMPEDANCE

 

DECAY SPECTRUM (200mS)

DECAY MAP (200mS)

 

 

 



 

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