What we know about the measurement:

Yamaha NS-6490 is a passive bookshelves that cost around 130 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: 87.8dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 20.5Hz (resp. 71.8Hz).
  • Reference level is normalised to 0.8dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 6.3dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.46 and would be 4.34 with a perfect subwoofer.
      • Details: NBD: ON 0.751, LW 0.722, SP 0.644, PIR 0.661; SM: SP0.747, PIR0.219; LFQ 1.213, LFX 67Hz
    • Tonality (Preference) Score is 4.59 with an EQ and would be 6.32 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.645, LW 0.639, SP 0.636, PIR 0.614; SM: SP0.943, PIR0.899; LFQ 1.061, LFX 36Hz
  • Link to Original review.
Yamaha NS-6490
AutomaticEQ (IIR)
Set preamp gain to: -9.0dB.
Type Freq Q Gain
3 22.0 0.26 3.0
3 26.0 0.4 3.0
3 31.0 0.42 3.0
3 299.0 0.88 3.0
3 3405.0 2.69 -2.53
3 4989.0 1.54 -4.16
3 12736.0 2.58 -6.0
Download

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

Yamaha NS-6490 filters_auto_eq

AutomaticEQ

Yamaha NS-6490 filters_eq_full

Target v.s. EQ

Yamaha NS-6490
flipflop@ASR (IIR)
Set preamp gain to: -0.0dB.
Type Freq Q Gain
3 342.0 5.0 0.6
3 432.0 5.0 -1.7
3 575.0 5.0 -3.6
3 620.0 5.0 12.0
3 644.0 5.0 -11.4
3 747.0 5.0 12.0
3 762.0 5.0 -13.0
3 1031.0 5.0 2.4
3 1080.0 1.645 -5.7
3 1552.0 5.0 -2.6
3 1958.0 5.0 2.5
3 2213.0 1.753 -3.9
3 2823.0 5.0 10.2
3 2950.0 5.0 -15.8
3 3714.0 5.0 -10.6
3 3742.0 2.221 12.0
3 4647.0 2.399 -10.3
3 6157.0 4.98 -3.7
3 10413.0 5.0 -1.7
3 12919.0 2.253 -6.9
Download

These EQ is designed by ASR member flipflop.

Yamaha NS-6490
Graphic EQ 15 bands
Set preamp gain to: -2.6dB.
Type Freq Q Gain
3 25.0 2.14 2.25
3 40.0 2.14 1.5
3 63.0 2.14 0.75
3 100.0 2.14 0.25
3 160.0 2.14 0.25
3 250.0 2.14 0.25
3 400.0 2.14 0.25
3 630.0 2.14 0.0
3 1000.0 2.14 -0.25
3 1600.0 2.14 -0.25
3 2500.0 2.14 -0.25
3 4000.0 2.14 -0.25
3 6300.0 2.14 -0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

Yamaha NS-6490
Graphic EQ 31 bands
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 2.25
3 31.0 4.32 1.75
3 40.0 4.32 1.5
3 50.0 4.32 1.0
3 63.0 4.32 0.75
3 80.0 4.32 0.25
3 100.0 4.32 0.25
3 125.0 4.32 0.25
3 160.0 4.32 0.25
3 200.0 4.32 0.25
3 250.0 4.32 0.25
3 315.0 4.32 0.25
3 400.0 4.32 0.25
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 -0.25
3 1000.0 4.32 -0.25
3 1250.0 4.32 -0.5
3 1600.0 4.32 -0.25
3 2000.0 4.32 0.0
3 2500.0 4.32 -0.25
3 3150.0 4.32 -0.25
3 4000.0 4.32 -0.25
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.25
3 8000.0 4.32 0.0
3 10000.0 4.32 0.0
3 12000.0 4.32 -0.25
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.

Yamaha NS-6490: comparison between EQs
Yamaha NS-6490

Comparison betweens various EQs

Yamaha NS-6490

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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