What we know about the measurement:

Hsu Research CCB-8 is a passive bookshelves

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • Sensitivity: 86.0dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 66.2Hz (resp. 53.0Hz).
  • Reference level is normalised to 0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.3dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 3.0 and would be 5.31 with a perfect subwoofer.
      • Details: NBD: ON 0.705, LW 0.595, SP 0.682, PIR 0.626; SM: SP0.863, PIR0.544; LFQ 1.135, LFX 49Hz
    • Tonality (Preference) Score is 5.33 with an EQ and would be 7.72 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.448, LW 0.272, SP 0.492, PIR 0.298; SM: SP0.943, PIR0.884; LFQ 1.135, LFX 51Hz
  • Link to Original review.
Hsu Research CCB-8
AutomaticEQ (IIR)
Set preamp gain to: -2.3dB.
Type Freq Q Gain
PK 125.0 1.29 -3.0
PK 181.0 2.95 0.89
PK 229.0 0.27 0.68
PK 354.0 2.99 1.12
PK 1180.0 2.95 -1.83
PK 1491.0 2.85 2.88
PK 2153.0 2.37 -2.64
PK 6709.0 1.08 2.78
PK 12662.0 1.28 -2.99
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Hsu Research CCB-8 filters_auto_eq

AutomaticEQ

Hsu Research CCB-8 filters_eq_full

Target v.s. EQ

Hsu Research CCB-8
Graphic EQ 15 bands
Set preamp gain to: -0.2dB.
Type Freq Q Gain
PK 25.0 2.14 0.0
PK 40.0 2.14 0.0
PK 63.0 2.14 0.25
PK 100.0 2.14 -0.5
PK 160.0 2.14 -0.25
PK 250.0 2.14 0.0
PK 400.0 2.14 0.25
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.0
PK 1600.0 2.14 0.0
PK 2500.0 2.14 -0.5
PK 4000.0 2.14 0.0
PK 6300.0 2.14 0.25
PK 10000.0 2.14 -0.25
PK 16000.0 2.14 -0.5
Download

These EQ is designed for a 15 bands graphical EQ.

Hsu Research CCB-8
Graphic EQ 31 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.0
PK 31.0 4.32 0.0
PK 40.0 4.32 0.0
PK 50.0 4.32 0.0
PK 63.0 4.32 0.25
PK 80.0 4.32 0.0
PK 100.0 4.32 -0.5
PK 125.0 4.32 -0.5
PK 160.0 4.32 0.0
PK 200.0 4.32 0.0
PK 250.0 4.32 0.25
PK 315.0 4.32 0.25
PK 400.0 4.32 0.25
PK 500.0 4.32 0.25
PK 630.0 4.32 0.0
PK 800.0 4.32 0.25
PK 1000.0 4.32 0.0
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.25
PK 2000.0 4.32 -0.25
PK 2500.0 4.32 -0.25
PK 3150.0 4.32 0.0
PK 4000.0 4.32 0.0
PK 5000.0 4.32 0.25
PK 6300.0 4.32 0.5
PK 8000.0 4.32 0.25
PK 10000.0 4.32 0.0
PK 12000.0 4.32 -0.25
PK 16000.0 4.32 0.0
PK 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Hsu Research CCB-8: comparison between EQs
Hsu Research CCB-8

Comparison betweens various EQs

Hsu Research CCB-8

Improvements made by EQ

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