What we know about the measurement:

KEF R2c is a passive center that cost around 1300 USD

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 85.1dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 79.8Hz (resp. 66.7Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.4dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.08 and would be 6.93 with a perfect subwoofer.
      • Details: NBD: ON 0.472, LW 0.356, SP 0.298, PIR 0.288; SM: SP0.852, PIR0.556; LFQ 1.111, LFX 66Hz
    • Tonality (Preference) Score is 5.84 with an EQ and would be 8.31 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.373, LW 0.261, SP 0.277, PIR 0.224; SM: SP0.976, PIR0.959; LFQ 1.111, LFX 54Hz
  • Horizontal measurement
  • Link to original Review: eac review. Links to other reviews: yt review , white_paper review .
KEF R2c
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
3 52.0 1.58 3.0
3 289.0 2.58 -1.43
3 1586.0 3.0 -1.02
3 1954.0 3.0 2.99
3 2491.0 2.95 -1.93
3 7308.0 0.67 -2.5
3 13652.0 1.41 -2.67
Download

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

KEF R2c filters_auto_eq

AutomaticEQ

KEF R2c filters_eq_full

Target v.s. EQ

KEF R2c
Graphic EQ 15 bands
Set preamp gain to: -1.0dB.
Type Freq Q Gain
3 25.0 2.14 0.75
3 40.0 2.14 0.75
3 63.0 2.14 0.75
3 100.0 2.14 0.0
3 160.0 2.14 0.0
3 250.0 2.14 -0.25
3 400.0 2.14 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 0.0
3 1600.0 2.14 0.0
3 2500.0 2.14 -0.5
3 4000.0 2.14 -0.25
3 6300.0 2.14 -0.5
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 R2c
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 0.0
3 125.0 4.32 0.0
3 160.0 4.32 0.0
3 200.0 4.32 0.0
3 250.0 4.32 -0.25
3 315.0 4.32 -0.25
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 -0.25
3 800.0 4.32 0.0
3 1000.0 4.32 0.25
3 1250.0 4.32 0.0
3 1600.0 4.32 0.0
3 2000.0 4.32 0.5
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 -0.25
3 6300.0 4.32 -0.25
3 8000.0 4.32 -0.5
3 10000.0 4.32 -0.5
3 12000.0 4.32 -0.5
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 R2c: comparison between EQs
KEF R2c

Comparison betweens various EQs

KEF R2c

Improvements made by EQ
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
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
;