What we know about the measurement:

KEF R8 Meta is a passive surround that cost around 800 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 84.8dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 117.2Hz (resp. 98.1Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.6dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-40.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-50.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Note: The tonality (Preference) score does not make sense for surround speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is 1.58 and would be 5.21 with a perfect subwoofer.
      • Details: NBD: ON 0.606, LW 0.523, SP 0.505, PIR 0.502; SM: SP0.642, PIR0.235; LFQ 0.835, LFX 101Hz
    • Tonality (Preference) Score is 4.84 with an EQ and would be 8.15 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.341, LW 0.281, SP 0.266, PIR 0.252; SM: SP0.952, PIR0.892; LFQ 0.71, LFX 84Hz
  • Link to original Review: asr review. .
KEF R8 Meta
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
3 98.0 2.08 3.0
3 178.0 1.82 -2.38
3 976.0 2.9 -1.65
3 1333.0 2.14 3.0
3 2491.0 2.97 -1.94
3 7834.0 0.88 -4.37
3 11085.0 2.61 1.17
Download

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

KEF R8 Meta filters_auto_eq

AutomaticEQ

KEF R8 Meta filters_eq_full

Target v.s. EQ

KEF R8 Meta
maiky76@ASR LW (IIR)
Set preamp gain to: -3.3dB.
Type Freq Q Gain
1 86.75 1.15 0.0
3 184.56 1.88 -2.84
3 947.17 1.73 -1.13
3 1360.98 2.23 3.83
3 2527.16 4.25 -1.03
3 7433.37 1.17 -3.23
3 13039.93 1.05 1.54
Download

These EQ is designed by ASR member maiky76. These EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

KEF R8 Meta
maiky76@ASR (IIR)
Set preamp gain to: -3.4dB.
Type Freq Q Gain
1 86.25 1.15 0.0
3 179.02 1.59 -3.03
3 1010.95 2.48 -2.04
3 1302.22 2.58 4.4
3 2514.16 3.25 -2.0
3 7518.11 0.98 -4.11
3 11528.5 2.59 1.11
Download

These EQ is designed by ASR member maiky76. These EQ optimise the Harman score and is a good start for far field listening like in your living room.

KEF R8 Meta
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.5
3 100.0 2.14 0.5
3 160.0 2.14 -0.25
3 250.0 2.14 -0.25
3 400.0 2.14 0.0
3 630.0 2.14 -0.25
3 1000.0 2.14 0.0
3 1600.0 2.14 0.25
3 2500.0 2.14 -0.5
3 4000.0 2.14 -0.5
3 6300.0 2.14 -0.75
3 10000.0 2.14 -0.75
3 16000.0 2.14 -0.5
Download

These EQ is designed for a 15 bands graphical EQ.

KEF R8 Meta
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.5
3 31.0 4.32 0.5
3 40.0 4.32 0.5
3 50.0 4.32 0.5
3 63.0 4.32 0.5
3 80.0 4.32 0.5
3 100.0 4.32 0.5
3 125.0 4.32 0.25
3 160.0 4.32 -0.25
3 200.0 4.32 -0.25
3 250.0 4.32 -0.25
3 315.0 4.32 0.0
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 0.0
3 1000.0 4.32 0.0
3 1250.0 4.32 0.5
3 1600.0 4.32 0.5
3 2000.0 4.32 0.0
3 2500.0 4.32 -0.25
3 3150.0 4.32 -0.25
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.75
3 8000.0 4.32 -0.75
3 10000.0 4.32 -0.5
3 12000.0 4.32 -0.25
3 16000.0 4.32 -0.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

KEF R8 Meta: comparison between EQs
KEF R8 Meta

Comparison betweens various EQs

KEF R8 Meta

Improvements made by 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
Frequency Frequency with EQ
;