What we know about the measurement:

Yamaha NS-800A is a passive bookshelves that cost around 4800 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 85.5dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 64.5Hz (resp. 43.9Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.46 and would be 6.23 with a perfect subwoofer.
      • Details: NBD: ON 0.454, LW 0.382, SP 0.389, PIR 0.349; SM: SP0.671, PIR0.312; LFQ 0.726, LFX 37Hz
    • Tonality (Preference) Score is 6.56 with an EQ and would be 8.14 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.371, LW 0.282, SP 0.315, PIR 0.248; SM: SP0.965, PIR0.917; LFQ 0.836, LFX 33Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
  • Vendor specifications:
    • Sensitivity 86.5 dB
    • Impedance 3.8 Ohm
    • Size
      • Width 231mm
      • Height 420mm
      • Depth 358mm
    • Weight 13.0kg
Yamaha NS-800A
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
PK 31.0 1.47 2.73
PK 67.0 1.7 2.63
PK 144.0 2.44 -1.02
PK 190.0 1.38 -0.9
PK 560.0 2.86 2.47
PK 643.0 2.92 -3.39
PK 16239.0 0.5 -8.29
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Yamaha NS-800A filters_auto_eq

AutomaticEQ

Yamaha NS-800A filters_eq_full

Target v.s. 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
Frequency Frequency with EQ
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