What we know about the measurement:

Bowers & Wilkins 686 S2 is a passive bookshelves

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • -3dB (resp. -6db) point v.s. reference is at 74.4Hz (resp. 59.1Hz).
  • Reference level is normalised to 0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.8dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.01 and would be 6.67 with a perfect subwoofer.
      • Details: NBD: ON 0.578, LW 0.426, SP 0.293, PIR 0.321; SM: SP0.83, PIR0.598; LFQ 1.006, LFX 59Hz
    • Tonality (Preference) Score is 5.57 with an EQ and would be 7.95 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.455, LW 0.298, SP 0.275, PIR 0.25; SM: SP0.961, PIR0.929; LFQ 1.006, LFX 51Hz
  • Link to original Review: asr review. Links to other reviews: noa review , ssn review .
  • Vendor specifications:
    • Sensitivity 85 dB
    • Impedance 5.2 Ohm
    • Size
      • Width 160mm
      • Height 315mm
      • Depth 229mm
    • Weight 4.6kg
Bowers & Wilkins 686 S2
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
PK 52.0 1.82 2.08
PK 83.0 1.01 2.36
PK 172.0 0.54 -1.53
PK 942.0 2.7 -1.58
PK 1429.0 2.99 -2.41
PK 2324.0 0.81 2.99
PK 7834.0 0.35 -2.94
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
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