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Click on links for full set of plots.

Horizontal directivity plots

KEF LS50 H Contour Plot

Full horizontal contour plot

Vertical directivity plots

KEF LS50 V Contour Plot

Full vertical contour plot

Directivity index plots

KEF LS50 Full Sphere DI Plot

Full-sphere directivity index plot

Constant directivity metrics plots

KEF LS50 Horizontal Polar XCorr Plot

Full horizontal NACC plot

Measurement notes:

  1. Date performed: not available
  2. Nominal measurement distance: 1.6 meters
  3. Transducer type: coaxial dynamic
  4. Exponential sine sweep settings:
    • Frequency range: 20 Hz to 48 kHz
    • Duration: 5 seconds
  5. Impulse response window settings:
    • Type: Tukey (cosine fade-in, flat, cosine fade-out)
    • Duration: (0.5, 3, 0.5) msec
  6. Frequency resolution: 250 Hz
  7. Spectral smoothing: 1/24th octave
  8. Directivity index averaging range: 500 Hz to 20 kHz
  9. Alignment: The microphone was aligned with the center of the loudspeaker cabinet and the axis of rotation passed through the frontmost surface of the loudspeaker cabinet.