What we know about the measurement:

Hsu Research HB-1 MK2 is a passive bookshelves that cost around 218 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 .
  • Sensitivity: 86.3dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 74.7Hz (resp. 58.6Hz).
  • Reference level is normalised to -0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 4.5dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-40.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 3.86 and would be 6.33 with a perfect subwoofer.
      • Details: NBD: ON 0.566, LW 0.484, SP 0.404, PIR 0.406; SM: SP0.88, PIR0.551; LFQ 0.29, LFX 54Hz
    • Tonality (Preference) Score is 5.57 with an EQ and would be 7.7 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.466, LW 0.395, SP 0.387, PIR 0.337; SM: SP0.98, PIR0.944; LFQ 0.38, LFX 45Hz
  • Link to Original review.
Hsu Research HB-1 MK2
AutomaticEQ (IIR)
Set preamp gain to: -3.1dB.
Type Freq Q Gain
3 46.0 2.41 2.89
3 83.0 2.92 2.19
3 356.0 2.13 1.67
3 1202.0 2.99 1.85
3 1288.0 1.34 -1.59
3 4051.0 2.8 2.76
3 14134.0 0.41 -4.51
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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 HB-1 MK2 filters_auto_eq

AutomaticEQ

Hsu Research HB-1 MK2 filters_eq_full

Target v.s. EQ

Hsu Research HB-1 MK2
Graphic EQ 15 bands
Set preamp gain to: -1.1dB.
Type Freq Q Gain
3 25.0 2.14 0.75
3 40.0 2.14 0.75
3 63.0 2.14 0.75
3 100.0 2.14 0.25
3 160.0 2.14 0.0
3 250.0 2.14 1.0
3 400.0 2.14 0.25
3 630.0 2.14 -0.25
3 1000.0 2.14 0.0
3 1600.0 2.14 0.0
3 2500.0 2.14 0.0
3 4000.0 2.14 0.5
3 6300.0 2.14 -0.25
3 10000.0 2.14 -0.5
3 16000.0 2.14 -0.75
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These EQ is designed for a 15 bands graphical EQ.

Hsu Research HB-1 MK2
Graphic EQ 31 bands
Set preamp gain to: -1.1dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.75
3 31.0 4.32 0.75
3 40.0 4.32 0.75
3 50.0 4.32 0.75
3 63.0 4.32 0.75
3 80.0 4.32 0.5
3 100.0 4.32 0.25
3 125.0 4.32 0.0
3 160.0 4.32 0.0
3 200.0 4.32 0.0
3 250.0 4.32 1.0
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 0.0
3 1000.0 4.32 0.0
3 1250.0 4.32 0.25
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
3 2500.0 4.32 0.25
3 3150.0 4.32 0.0
3 4000.0 4.32 0.75
3 5000.0 4.32 0.0
3 6300.0 4.32 0.0
3 8000.0 4.32 -0.25
3 10000.0 4.32 -0.25
3 12000.0 4.32 -0.5
3 16000.0 4.32 -0.75
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Hsu Research HB-1 MK2: comparison between EQs
Hsu Research HB-1 MK2

Comparison betweens various EQs

Hsu Research HB-1 MK2

Improvements made by EQ

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