What we know about the measurement:

KEF LSX is a active bookshelves speaker that cost around 1250USD for a pair .

  • Quality of the measurement data is high .
  • Origin of the data is ASR .
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 64.5Hz (resp. 54.2Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.9dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-50.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.6 and would be 6.9 with a perfect subwoofer.
      • Details: NBD: ON 0.6, LW 0.53, SP 0.49, PIR 0.47; SM: SP0.94, PIR0.89; LFQ 0.43, LFX 48Hz
    • Tonality (Preference) Score is 5.4 with an EQ and would be 7.6 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.47, LW 0.41, SP 0.41, PIR 0.35; SM: SP0.96, PIR0.91; LFQ 0.44, LFX 46Hz
  • Vertical measurement
  • Link to Original review.
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ