What we know about the measurement:

NHT SB2 is a passive bookshelves that cost around 400 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: 83.4dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 60.1Hz (resp. 52.7Hz).
  • Reference level is normalised to -0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 5.6dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 3.47 and would be 5.89 with a perfect subwoofer.
      • Details: NBD: ON 0.656, LW 0.563, SP 0.515, PIR 0.518; SM: SP0.778, PIR0.601; LFQ 0.666, LFX 52Hz
    • Tonality (Preference) Score is 5.76 with an EQ and would be 7.9 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.412, LW 0.322, SP 0.356, PIR 0.313; SM: SP0.953, PIR0.939; LFQ 0.589, LFX 45Hz
  • Link to Original review.
NHT SB2
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
3 44.0 0.25 2.99
3 105.0 1.29 -5.54
3 849.0 2.99 -3.57
3 3177.0 1.57 3.0
3 4342.0 2.89 -2.44
3 9989.0 0.71 -3.78
3 12736.0 2.82 1.56
Download

These EQ optimise the Harman score and is a good start for far field listening like in your living room.

NHT SB2 filters_auto_eq

AutomaticEQ

NHT SB2 filters_eq_full

Target v.s. EQ

NHT SB2
flipflop@ASR (IIR)
Set preamp gain to: -3.6dB.
Type Freq Q Gain
3 347.0 10.0 0.4
3 409.0 11.0 0.9
3 465.0 4.5 -0.8
3 875.0 2.5 -3.9
3 958.0 10.0 -1.1
3 1075.0 5.5 3.7
3 1435.0 12.0 0.3
3 1565.0 13.0 -0.5
3 1692.0 7.0 1.0
3 1945.0 10.0 1.9
3 2238.0 18.0 1.0
3 2820.0 10.0 -1.3
3 3040.0 20.0 1.0
3 3220.0 2.5 3.7
3 4490.0 2.7 -1.8
3 6380.0 2.9 -1.5
3 8580.0 3.1 -2.2
3 10720.0 3.2 -1.9
3 13400.0 4.0 0.5
3 15750.0 4.5 -0.4
Download

These EQ is designed by ASR member flipflop.

NHT SB2
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
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 0.0
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 0.25
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 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

NHT SB2
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.5
3 31.0 4.32 0.5
3 40.0 4.32 0.5
3 50.0 4.32 0.5
3 63.0 4.32 0.25
3 80.0 4.32 -0.25
3 100.0 4.32 -0.5
3 125.0 4.32 -0.5
3 160.0 4.32 -0.25
3 200.0 4.32 0.0
3 250.0 4.32 0.0
3 315.0 4.32 0.0
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 -0.5
3 1000.0 4.32 -0.25
3 1250.0 4.32 0.25
3 1600.0 4.32 0.0
3 2000.0 4.32 0.25
3 2500.0 4.32 0.25
3 3150.0 4.32 0.5
3 4000.0 4.32 0.25
3 5000.0 4.32 -0.25
3 6300.0 4.32 -0.25
3 8000.0 4.32 -0.25
3 10000.0 4.32 -0.25
3 12000.0 4.32 0.0
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.

NHT SB2: comparison between EQs
NHT SB2

Comparison betweens various EQs

NHT SB2

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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