What we know about the measurement:

SunAudio Purified 4 4XA25A tw35mm is a passive bookshelves that cost around 2800 USD for a pair.

  • Quality of the measurement data is medium.
  • Origin of the data is SunAudio.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • Sensitivity: 81.3dB (avg. 100Hz-1kHz for 2.83V estimated at 1m) . Sensitivity computed at the measurement distance (3.0m) over the same frequency range: 71.8dB.
  • -3dB (resp. -6db) point v.s. reference is at 73.4Hz (resp. 56.6Hz).
  • Reference level is normalised to -0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.0dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-80.0°, 80.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.21 and would be 8.81 with a perfect subwoofer.
      • Details: NBD: ON 0.197, LW 0.167, SP 0.229, PIR 0.171; SM: SP0.922, PIR0.919; LFQ 0.983, LFX 58Hz
  • Link to Original review.
  • Note: Sun Audio Purified 4 XP25A with a 35mm tweeter: crossover: Woofer: BW12 @ 1495Hz Tweeter: BW18 @ 2201Hz. Measurements are done at 3m.