What we know about the measurement:

KEF R3 is a passive bookshelves that cost around 1400 USD 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 69.6Hz (resp. 41.0Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.6dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.39 and would be 8.16 with a perfect subwoofer.
      • Details: NBD: ON 0.336, LW 0.293, SP 0.258, PIR 0.248; SM: SP0.948, PIR0.886; LFQ 0.67, LFX 37Hz
    • Tonality (Preference) Score is 7.01 with an EQ and would be 8.58 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.268, LW 0.228, SP 0.245, PIR 0.203; SM: SP0.964, PIR0.94; LFQ 0.842, LFX 33Hz
  • Link to original Review: asr review. Links to other reviews: eac review , yt review , white_paper review .
KEF R3
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
LS 69.0 0.66 2.87
PK 245.0 2.42 -0.46
PK 391.0 2.98 -0.85
PK 646.0 2.96 -1.08
PK 1261.0 0.49 1.26
PK 2545.0 2.79 0.34
PK 4966.0 2.04 -1.7
PK 10361.0 1.42 -0.75
PK 12662.0 0.72 1.29
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
KEF R3
flipflop@ASR (IIR)
Set preamp gain to: -1.9dB.
Type Freq Q Gain
PK 370.0 14.0 -0.8
PK 545.0 10.0 0.5
PK 638.0 25.0 -0.4
PK 832.0 10.0 0.6
PK 922.0 12.0 0.7
PK 1123.0 6.0 1.5
PK 1400.0 10.0 1.3
PK 1640.0 5.0 1.4
PK 1930.0 12.0 1.3
PK 2220.0 14.0 1.3
PK 2330.0 22.0 -0.6
PK 2850.0 8.0 -0.6
PK 3940.0 10.0 -0.4
PK 4280.0 20.0 -0.3
PK 5050.0 5.1 -1.0
PK 6790.0 4.7 -1.1
PK 7790.0 13.0 0.4
PK 8670.0 8.0 -0.9
PK 10500.0 8.0 -0.8
PK 16330.0 5.0 1.2
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This EQ is designed by ASR member flipflop.
KEF R3
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.5
PK 63.0 2.14 0.5
PK 100.0 2.14 0.0
PK 160.0 2.14 -0.25
PK 250.0 2.14 -0.25
PK 400.0 2.14 -0.25
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.25
PK 1600.0 2.14 0.25
PK 2500.0 2.14 0.0
PK 4000.0 2.14 0.0
PK 6300.0 2.14 -0.25
PK 10000.0 2.14 0.0
PK 16000.0 2.14 0.25
Download
This EQ is designed for a 15 bands graphical EQ.
KEF R3
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.5
PK 31.0 4.32 0.5
PK 40.0 4.32 0.5
PK 50.0 4.32 0.5
PK 63.0 4.32 0.5
PK 80.0 4.32 0.25
PK 100.0 4.32 0.0
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 -0.25
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 0.25
PK 1250.0 4.32 0.25
PK 1600.0 4.32 0.25
PK 2000.0 4.32 0.25
PK 2500.0 4.32 0.0
PK 3150.0 4.32 0.0
PK 4000.0 4.32 0.0
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 0.0
PK 10000.0 4.32 0.0
PK 12000.0 4.32 0.0
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 R3: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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