What we know about the measurement:

Zu Audio Method is a passive bookshelves that cost around 700 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 120.8Hz (resp. 66.7Hz).
  • Reference level is normalised to 0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 4.2dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 0.55 and would be 3.34 with a perfect subwoofer.
      • Details: NBD: ON 1.372, LW 0.873, SP 0.743, PIR 0.706; SM: SP0.709, PIR0.514; LFQ 1.151, LFX 64Hz
    • Tonality (Preference) Score is 2.39 with an EQ and would be 4.94 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 1.174, LW 0.702, SP 0.69, PIR 0.602; SM: SP0.869, PIR0.854; LFQ 1.151, LFX 56Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
  • Vendor specifications:
    • Dispersion: 90° horizontal and 90° vertical.
    • Sensitivity 94 dB
    • Impedance 8 Ohm
    • SPL
      • peak: 110 dB
    • Size
      • Width 222mm
      • Height 381mm
      • Depth 280mm
    • Weight 9kg
Zu Audio Method
AutomaticEQ (IIR)
Set preamp gain to: -2.5dB.
Type Freq Q Gain
PK 121.0 0.25 3.0
PK 424.0 0.55 -3.24
PK 1288.0 3.0 -6.31
PK 1532.0 3.0 3.0
PK 2862.0 0.25 3.0
PK 4051.0 1.5 -6.16
PK 16239.0 0.47 -4.06
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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