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 .
  • -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.
  • 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
PK 44.0 0.25 2.99
PK 105.0 1.29 -5.54
PK 849.0 2.99 -3.57
PK 3177.0 1.57 3.0
PK 4342.0 2.89 -2.44
PK 9989.0 0.71 -3.78
PK 12736.0 2.82 1.56
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
NHT SB2
flipflop@ASR (IIR)
Set preamp gain to: -3.6dB.
Type Freq Q Gain
PK 347.0 10.0 0.4
PK 409.0 11.0 0.9
PK 465.0 4.5 -0.8
PK 875.0 2.5 -3.9
PK 958.0 10.0 -1.1
PK 1075.0 5.5 3.7
PK 1435.0 12.0 0.3
PK 1565.0 13.0 -0.5
PK 1692.0 7.0 1.0
PK 1945.0 10.0 1.9
PK 2238.0 18.0 1.0
PK 2820.0 10.0 -1.3
PK 3040.0 20.0 1.0
PK 3220.0 2.5 3.7
PK 4490.0 2.7 -1.8
PK 6380.0 2.9 -1.5
PK 8580.0 3.1 -2.2
PK 10720.0 3.2 -1.9
PK 13400.0 4.0 0.5
PK 15750.0 4.5 -0.4
Download
This EQ is designed by ASR member flipflop.
NHT SB2
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
PK 25.0 2.14 0.25
PK 40.0 2.14 0.25
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 0.0
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 0.25
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 0.0
Download
This 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
PK 20.0 4.32 0.0
PK 25.0 4.32 0.5
PK 31.0 4.32 0.5
PK 40.0 4.32 0.5
PK 50.0 4.32 0.5
PK 63.0 4.32 0.25
PK 80.0 4.32 -0.25
PK 100.0 4.32 -0.5
PK 125.0 4.32 -0.5
PK 160.0 4.32 -0.25
PK 200.0 4.32 0.0
PK 250.0 4.32 0.0
PK 315.0 4.32 0.0
PK 400.0 4.32 0.0
PK 500.0 4.32 0.0
PK 630.0 4.32 0.0
PK 800.0 4.32 -0.5
PK 1000.0 4.32 -0.25
PK 1250.0 4.32 0.25
PK 1600.0 4.32 0.0
PK 2000.0 4.32 0.25
PK 2500.0 4.32 0.25
PK 3150.0 4.32 0.5
PK 4000.0 4.32 0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 -0.25
PK 10000.0 4.32 -0.25
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.0
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
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)
NHT SB2: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
;