What we know about the measurement:

AsciLab A6B Passive is a passive bookshelves that cost around 2900 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is AsciLab.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 81.9dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 38.5Hz (resp. 33.3Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-40.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.59 and would be 8.08 with a perfect subwoofer.
      • Details: NBD: ON 0.339, LW 0.304, SP 0.264, PIR 0.256; SM: SP0.927, PIR0.868; LFQ 0.755, LFX 32Hz
  • Link to original Review: asr review. .
  • Vendor specifications:
    • Size
      • Width 220mm
      • Height 400mm
      • Depth 260 mm)
    • Weight 13.0 kg
AsciLab A6B Passive
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
3 33.0 1.53 2.97
3 227.0 0.82 1.54
3 424.0 0.54 -1.09
3 666.0 1.54 1.6
3 1010.0 1.65 -0.89
3 1161.0 2.82 1.72
3 1333.0 2.86 -0.37
Download

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

AsciLab A6B Passive filters_auto_eq

AutomaticEQ

AsciLab A6B Passive filters_eq_full

Target v.s. EQ

AsciLab A6B Passive
AutomaticEQ LW (IIR)
Set preamp gain to: -3.8dB.
Type Freq Q Gain
3 32.0 2.96 2.85
3 38.0 1.44 1.22
3 139.0 2.72 0.51
3 211.0 2.01 0.84
3 600.0 1.96 0.56
3 976.0 2.84 -0.98
3 1121.0 2.99 0.93
Download

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

AsciLab A6B Passive: comparison between EQs
AsciLab A6B Passive

Comparison betweens various EQs

AsciLab A6B Passive

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
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