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
3 125.0 1.29 -3.0
3 181.0 2.95 0.89
3 229.0 0.27 0.68
3 354.0 2.99 1.12
3 1180.0 2.95 -1.83
3 1491.0 2.85 2.88
3 2153.0 2.37 -2.64
3 6709.0 1.08 2.78
3 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
3 25.0 2.14 0.0
3 40.0 2.14 0.0
3 63.0 2.14 0.25
3 100.0 2.14 -0.5
3 160.0 2.14 -0.25
3 250.0 2.14 0.0
3 400.0 2.14 0.25
3 630.0 2.14 0.0
3 1000.0 2.14 0.0
3 1600.0 2.14 0.0
3 2500.0 2.14 -0.5
3 4000.0 2.14 0.0
3 6300.0 2.14 0.25
3 10000.0 2.14 -0.25
3 16000.0 2.14 -0.5
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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
3 20.0 4.32 0.0
3 25.0 4.32 0.0
3 31.0 4.32 0.0
3 40.0 4.32 0.0
3 50.0 4.32 0.0
3 63.0 4.32 0.25
3 80.0 4.32 0.0
3 100.0 4.32 -0.5
3 125.0 4.32 -0.5
3 160.0 4.32 0.0
3 200.0 4.32 0.0
3 250.0 4.32 0.25
3 315.0 4.32 0.25
3 400.0 4.32 0.25
3 500.0 4.32 0.25
3 630.0 4.32 0.0
3 800.0 4.32 0.25
3 1000.0 4.32 0.0
3 1250.0 4.32 0.0
3 1600.0 4.32 0.25
3 2000.0 4.32 -0.25
3 2500.0 4.32 -0.25
3 3150.0 4.32 0.0
3 4000.0 4.32 0.0
3 5000.0 4.32 0.25
3 6300.0 4.32 0.5
3 8000.0 4.32 0.25
3 10000.0 4.32 0.0
3 12000.0 4.32 -0.25
3 16000.0 4.32 0.0
3 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
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