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 Vendors-Yamaha .
  • Format of the data is .
  • Sensitivity: 88.4dB (avg. 100Hz-1kHz for 2.83V measured 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 1.8 and would be 5.1 with a perfect subwoofer.
      • Details: NBD: ON 0.82, LW 0.68, SP 0.5, PIR 0.56; SM: SP0.81, PIR0.49; LFQ 1.6, LFX 83Hz
    • Tonality (Preference) Score is 4.1 with an EQ and would be 6.6 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.67, LW 0.56, SP 0.52, PIR 0.49; SM: SP0.94, PIR0.89; LFQ 1.39, LFX 56Hz
  • Link to Original review.
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ