What we know about the measurement:

KEF CI250RRM-THX is a passive inwall that cost around 2500 USD each.

  • Quality of the measurement data is medium.
  • Origin of the data is KEF.
  • Format of the data is a GLL file .
  • Sensitivity: 76.5dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 160.0Hz (resp. 65.0Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.2dB 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
    • Note: The tonality (Preference) score does not make sense for inwall speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is 3.06 and would be 6.2 with a perfect subwoofer.
      • Details: NBD: ON 0.491, LW 0.296, SP 0.3, PIR 0.276; SM: SP0.568, PIR0.243; LFQ 2.785, LFX 77Hz
    • Tonality (Preference) Score is 6.61 with an EQ and would be 8.34 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.364, LW 0.197, SP 0.271, PIR 0.205; SM: SP0.952, PIR0.941; LFQ 2.733, LFX 36Hz
  • Link to original Review: white_paper review. .
  • Note: The speaker is optimised for being listen to off axis at 30 up to 60 degrees.
KEF CI250RRM-THX
AutomaticEQ (IIR)
Set preamp gain to: -5.1dB.
Type Freq Q Gain
3 47.0 0.25 2.98
3 160.0 0.25 2.95
3 211.0 1.27 -2.16
3 1202.0 1.76 -2.35
3 1760.0 2.98 -2.13
3 3405.0 2.88 -2.27
3 6818.0 2.94 -1.57
Download

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

KEF CI250RRM-THX filters_auto_eq

AutomaticEQ

KEF CI250RRM-THX filters_eq_full

Target v.s. EQ

KEF CI250RRM-THX
AutomaticEQ LW (IIR)
Set preamp gain to: -5.5dB.
Type Freq Q Gain
3 117.0 0.76 2.86
3 369.0 1.43 1.88
3 714.0 1.76 2.18
3 1288.0 0.72 -2.17
3 13186.0 0.36 2.63
3 15685.0 2.44 3.0
Download

These EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

KEF CI250RRM-THX: comparison between EQs
KEF CI250RRM-THX

Comparison betweens various EQs

KEF CI250RRM-THX

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
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