What we know about the measurement:

KEF LS50 Wireless II is an active bookshelves that cost around 2800 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 51.3Hz (resp. 45.4Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.0dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.65 and would be 7.73 with a perfect subwoofer.
      • Details: NBD: ON 0.41, LW 0.308, SP 0.31, PIR 0.276; SM: SP0.924, PIR0.817; LFQ 0.676, LFX 43Hz
    • Tonality (Preference) Score is 6.55 with an EQ and would be 8.56 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.329, LW 0.228, SP 0.211, PIR 0.173; SM: SP0.98, PIR0.955; LFQ 0.676, LFX 42Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
KEF LS50 Wireless II
AutomaticEQ (IIR)
Set preamp gain to: -2.5dB.
Type Freq Q Gain
HS 62.0 0.89 -2.68
PK 109.0 0.69 -2.36
PK 158.0 1.9 0.93
PK 844.0 2.06 -1.47
PK 1103.0 2.47 2.45
PK 2909.0 1.51 2.22
PK 3801.0 1.84 -1.11
PK 4966.0 0.89 0.09
LS 14473.0 1.14 2.65
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
KEF LS50 Wireless II
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 25.0 2.14 0.25
PK 40.0 2.14 0.25
PK 63.0 2.14 0.0
PK 100.0 2.14 -0.25
PK 160.0 2.14 -0.25
PK 250.0 2.14 0.0
PK 400.0 2.14 0.25
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.5
PK 1600.0 2.14 0.5
PK 2500.0 2.14 0.5
PK 4000.0 2.14 0.25
PK 6300.0 2.14 0.25
PK 10000.0 2.14 0.25
PK 16000.0 2.14 0.25
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This EQ is designed for a 15 bands graphical EQ.
KEF LS50 Wireless II
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.25
PK 31.0 4.32 0.25
PK 40.0 4.32 0.25
PK 50.0 4.32 0.25
PK 63.0 4.32 0.0
PK 80.0 4.32 -0.25
PK 100.0 4.32 -0.25
PK 125.0 4.32 -0.25
PK 160.0 4.32 -0.25
PK 200.0 4.32 0.0
PK 250.0 4.32 0.0
PK 315.0 4.32 0.0
PK 400.0 4.32 0.25
PK 500.0 4.32 0.0
PK 630.0 4.32 0.0
PK 800.0 4.32 0.0
PK 1000.0 4.32 0.5
PK 1250.0 4.32 0.5
PK 1600.0 4.32 0.5
PK 2000.0 4.32 0.5
PK 2500.0 4.32 0.5
PK 3150.0 4.32 0.5
PK 4000.0 4.32 0.25
PK 5000.0 4.32 0.25
PK 6300.0 4.32 0.25
PK 8000.0 4.32 0.25
PK 10000.0 4.32 0.25
PK 12000.0 4.32 0.25
PK 16000.0 4.32 0.25
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
KEF LS50 Wireless II: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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