What we know about the measurement:

NHT Super Zero 2.1 is a passive bookshelves that cost around 250 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 101.1Hz (resp. 85.0Hz).
  • Reference level is normalised to -0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.4dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 3.37 and would be 6.67 with a perfect subwoofer.
      • Details: NBD: ON 0.505, LW 0.424, SP 0.546, PIR 0.455; SM: SP0.787, PIR0.696; LFQ 0.563, LFX 84Hz
    • Tonality (Preference) Score is 5.03 with an EQ and would be 8.1 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.385, LW 0.295, SP 0.34, PIR 0.258; SM: SP0.924, PIR0.926; LFQ 0.563, LFX 74Hz
  • Link to Original review.
NHT Super Zero 2.1
AutomaticEQ (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
PK 88.0 1.43 3.0
PK 160.0 1.54 -2.87
PK 356.0 2.98 0.85
PK 1887.0 0.38 -1.69
PK 1954.0 3.0 2.97
PK 2862.0 0.99 2.89
PK 4342.0 0.9 -1.75
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
NHT Super Zero 2.1
flipflop@ASR (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 405.0 7.0 0.4
PK 614.0 6.0 -0.5
PK 688.0 20.0 -0.6
PK 799.0 18.0 -1.2
PK 910.0 3.5 -1.2
PK 1190.0 15.0 0.7
PK 1352.0 6.0 -1.7
PK 1578.0 10.0 1.2
PK 1940.0 9.0 2.4
PK 2290.0 8.0 2.5
PK 2495.0 15.0 -1.6
PK 2750.0 15.0 1.1
PK 3350.0 8.0 1.4
PK 3735.0 25.0 -0.8
PK 4410.0 15.0 0.9
PK 4760.0 20.0 -0.5
PK 5360.0 13.0 -0.8
PK 5920.0 6.5 1.0
PK 10800.0 6.0 -0.5
PK 15540.0 2.8 -0.6
Download
This EQ is designed by ASR member flipflop.
NHT Super Zero 2.1
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.5
PK 63.0 2.14 0.5
PK 100.0 2.14 0.5
PK 160.0 2.14 -0.25
PK 250.0 2.14 -0.25
PK 400.0 2.14 0.0
PK 630.0 2.14 0.0
PK 1000.0 2.14 -0.25
PK 1600.0 2.14 0.25
PK 2500.0 2.14 0.5
PK 4000.0 2.14 -0.25
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 Super Zero 2.1
Graphic EQ 31 bands
Set preamp gain to: -0.9dB.
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 0.5
PK 80.0 4.32 0.5
PK 100.0 4.32 0.5
PK 125.0 4.32 0.0
PK 160.0 4.32 -0.25
PK 200.0 4.32 -0.25
PK 250.0 4.32 -0.25
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 -0.25
PK 1000.0 4.32 -0.25
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.25
PK 2000.0 4.32 0.75
PK 2500.0 4.32 0.5
PK 3150.0 4.32 0.25
PK 4000.0 4.32 0.0
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 0.0
PK 8000.0 4.32 0.0
PK 10000.0 4.32 0.0
PK 12000.0 4.32 0.0
PK 16000.0 4.32 0.25
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 Super Zero 2.1: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
;