What we know about the measurement:

NHT C3 is a passive bookshelves that cost around 600 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 63.0Hz (resp. 52.7Hz).
  • Reference level is normalised to 0.1dB 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 4.29 and would be 6.7 with a perfect subwoofer.
      • Details: NBD: ON 0.422, LW 0.343, SP 0.375, PIR 0.324; SM: SP0.704, PIR0.45; LFQ 0.729, LFX 52Hz
    • Tonality (Preference) Score is 6.52 with an EQ and would be 8.6 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.287, LW 0.234, SP 0.255, PIR 0.196; SM: SP0.955, PIR0.958; LFQ 0.644, LFX 43Hz
  • Link to Original review.
NHT C3
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 44.0 1.08 3.0
PK 109.0 1.53 -2.85
PK 470.0 1.54 -2.15
PK 739.0 2.75 1.67
PK 1083.0 2.98 2.0
PK 7059.0 1.5 -2.3
PK 15685.0 0.96 -5.16
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.
NHT C3
flipflop@ASR (IIR)
Set preamp gain to: -2.2dB.
Type Freq Q Gain
PK 330.0 2.5 0.4
PK 369.0 15.0 -0.7
PK 432.0 10.0 -0.3
PK 501.0 1.6 -1.5
PK 730.0 2.8 1.8
PK 815.0 10.0 0.4
PK 1090.0 3.4 2.1
PK 1335.0 9.0 -0.7
PK 1559.0 10.0 1.5
PK 1730.0 10.0 -0.8
PK 1888.0 15.0 1.1
PK 2095.0 13.0 -1.1
PK 2285.0 16.0 1.2
PK 2495.0 14.0 -1.0
PK 2715.0 10.0 1.9
PK 3240.0 14.0 0.5
PK 3720.0 13.0 -1.0
HS 4800.0 1.5772935127949521 -2.0
PK 6660.0 8.0 -0.5
PK 15600.0 2.0 -3.5
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This EQ is designed by ASR member flipflop.
NHT C3
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 0.0
PK 400.0 2.14 -0.25
PK 630.0 2.14 0.0
PK 1000.0 2.14 0.5
PK 1600.0 2.14 0.25
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 -0.75
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This EQ is designed for a 15 bands graphical EQ.
NHT C3
Graphic EQ 31 bands
Set preamp gain to: -0.4dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.25
PK 31.0 4.32 0.25
PK 40.0 4.32 0.25
PK 50.0 4.32 0.25
PK 63.0 4.32 0.25
PK 80.0 4.32 0.0
PK 100.0 4.32 -0.25
PK 125.0 4.32 -0.25
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 -0.25
PK 400.0 4.32 -0.25
PK 500.0 4.32 -0.25
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 0.0
PK 2000.0 4.32 -0.25
PK 2500.0 4.32 -0.25
PK 3150.0 4.32 -0.25
PK 4000.0 4.32 -0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.5
PK 8000.0 4.32 -0.5
PK 10000.0 4.32 -0.5
PK 12000.0 4.32 -0.5
PK 16000.0 4.32 -0.75
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 C3: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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