What we know about the measurement:

Hsu Research CCB-8 is a passive bookshelves that cost around 389 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 60.1Hz (resp. 55.7Hz).
  • Reference level is normalised to 0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 7.1dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.85 and would be 4.27 with a perfect subwoofer.
      • Details: NBD: ON 0.997, LW 0.774, SP 0.655, PIR 0.673; SM: SP0.803, PIR0.467; LFQ 0.81, LFX 52Hz
    • Tonality (Preference) Score is 4.88 with an EQ and would be 7.24 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.627, LW 0.396, SP 0.396, PIR 0.336; SM: SP0.954, PIR0.919; LFQ 0.81, LFX 51Hz
  • Link to original Review: asr review. Links to other reviews: ahl review .
  • Vendor specifications:
    • Sensitivity 94 dB
    • Impedance 8 Ohm
    • Size
      • Width 304mm
      • Height 266mm
      • Depth 381mm
    • Weight 10.0kg
Hsu Research CCB-8
AutomaticEQ (IIR)
Set preamp gain to: -5.0dB.
Type Freq Q Gain
PK 155.0 1.72 -2.59
PK 643.0 4.13 -3.51
PK 1083.0 5.89 -4.8
PK 1288.0 4.91 -8.69
PK 1480.0 1.17 4.81
PK 1760.0 2.08 3.16
PK 8694.0 0.27 -3.62
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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