What we know about the measurement:

Bowers & Wilkins CWM7.5 is a passive inwall

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • Sensitivity: 87.1dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 69.0Hz (resp. 66.2Hz).
  • Reference level is normalised to 0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.8dB over the same frequency range.
  • 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 1.92 and would be 4.67 with a perfect subwoofer.
      • Details: NBD: ON 0.787, LW 0.628, SP 0.616, PIR 0.579; SM: SP0.399, PIR0.297; LFQ 0.158, LFX 63Hz
    • Tonality (Preference) Score is 4.71 with an EQ and would be 7.35 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.615, LW 0.377, SP 0.354, PIR 0.275; SM: SP0.812, PIR0.871; LFQ 0.158, LFX 59Hz
  • Link to Original review.
Bowers & Wilkins CWM7.5
AutomaticEQ (IIR)
Set preamp gain to: -1.3dB.
Type Freq Q Gain
3 62.0 2.17 2.97
3 98.0 2.55 -6.49
3 130.0 2.98 -5.98
3 197.0 1.01 -4.57
3 560.0 2.87 1.69
3 6144.0 1.71 -1.51
3 11882.0 0.92 -8.89
Download

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

Bowers & Wilkins CWM7.5 filters_auto_eq

AutomaticEQ

Bowers & Wilkins CWM7.5 filters_eq_full

Target v.s. EQ

Bowers & Wilkins CWM7.5
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.25
3 100.0 2.14 -1.25
3 160.0 2.14 -0.75
3 250.0 2.14 -0.5
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 0.25
3 4000.0 2.14 0.25
3 6300.0 2.14 0.0
3 10000.0 2.14 -0.5
3 16000.0 2.14 -0.25
Download

These EQ is designed for a 15 bands graphical EQ.

Bowers & Wilkins CWM7.5
Graphic EQ 31 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.25
3 31.0 4.32 0.25
3 40.0 4.32 0.25
3 50.0 4.32 0.25
3 63.0 4.32 0.25
3 80.0 4.32 -0.5
3 100.0 4.32 -1.0
3 125.0 4.32 -1.25
3 160.0 4.32 -0.75
3 200.0 4.32 -0.75
3 250.0 4.32 -0.5
3 315.0 4.32 -0.5
3 400.0 4.32 -0.25
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 -0.25
3 1000.0 4.32 -0.25
3 1250.0 4.32 -0.25
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
3 2500.0 4.32 0.0
3 3150.0 4.32 0.0
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.25
3 6300.0 4.32 -0.5
3 8000.0 4.32 -0.5
3 10000.0 4.32 -0.75
3 12000.0 4.32 -1.0
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.

Bowers & Wilkins CWM7.5: comparison between EQs
Bowers & Wilkins CWM7.5

Comparison betweens various EQs

Bowers & Wilkins CWM7.5

Improvements made by EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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