What we know about the measurement:

KEF Reference 5 is a passive floorstanders that cost around 16800 USD each.

  • Quality of the measurement data is medium.
  • Origin of the data is KEF.
  • Format of the data is a scanned image .
  • Sensitivity: 89.4dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 31.3Hz (resp. 27.3Hz).
  • Reference level is normalised to 0.8dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.0dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 7.55 and would be 8.45 with a perfect subwoofer.
      • Details: NBD: ON 0.342, LW 0.233, SP 0.256, PIR 0.219; SM: SP0.987, PIR0.981; LFQ 1.767, LFX 23Hz
    • Tonality (Preference) Score is 7.95 with an EQ and would be 8.77 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.265, LW 0.17, SP 0.203, PIR 0.157; SM: SP0.965, PIR0.957; LFQ 1.767, LFX 22Hz
  • Link to original Review: white_paper review. .
KEF Reference 5
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
LS 40.0 1.01 2.98
PK 58.0 0.73 -1.44
PK 354.0 1.73 -0.76
PK 691.0 2.41 0.43
PK 2226.0 1.57 0.18
PK 4064.0 2.57 0.78
PK 6069.0 2.5 0.47
PK 8766.0 2.47 1.71
PK 11843.0 0.47 0.97
Download

These EQ optimise the Harman score and is a good start for far field listening like in your living room.

KEF Reference 5 filters_auto_eq

AutomaticEQ

KEF Reference 5 filters_eq_full

Target v.s. EQ

KEF Reference 5
Graphic EQ 15 bands
Set preamp gain to: -0.5dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.0
PK 63.0 2.14 -0.25
PK 100.0 2.14 -0.25
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 0.0
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 0.25
PK 16000.0 2.14 0.25
Download

These EQ is designed for a 15 bands graphical EQ.

KEF Reference 5
Graphic EQ 31 bands
Set preamp gain to: -0.3dB.
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 0.0
PK 50.0 4.32 0.0
PK 63.0 4.32 0.0
PK 80.0 4.32 -0.25
PK 100.0 4.32 0.0
PK 125.0 4.32 0.0
PK 160.0 4.32 0.0
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 0.0
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.0
PK 2000.0 4.32 0.0
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 0.0
PK 8000.0 4.32 0.25
PK 10000.0 4.32 0.25
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.0
PK 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

KEF Reference 5: comparison between EQs
KEF Reference 5

Comparison betweens various EQs

KEF Reference 5

Improvements made by EQ
CEA2034
CEA2034 Normalized
On Axis
Estimated In-Room Response
CEA2034
CEA2034 Normalized
On Axis
Estimated In-Room Response
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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