What we know about the measurement:

Yamaha NS-A638 is a passive bookshelves speaker .

  • Quality of the measurement data is unknown .
  • Origin of the data is Yamaha.
  • Format of the data is .
  • Sensitivity: 88.4dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 195.8Hz (resp. 90.4Hz).
  • Reference level is normalised to 1.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 5.8dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.54 and would be 4.83 with a perfect subwoofer.
      • Details: NBD: ON 0.82, LW 0.684, SP 0.498, PIR 0.582; SM: SP0.814, PIR0.404; LFQ 1.605, LFX 84Hz
    • Tonality (Preference) Score is 4.65 with an EQ and would be 7.02 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.608, LW 0.49, SP 0.46, PIR 0.42; SM: SP0.949, PIR0.911; LFQ 1.391, LFX 51Hz
  • Link to Original review.
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ