What we know about the measurement:

SunAudio Purified 4 4XP25B Fiber+Berryllium is a passive bookshelves that cost around 3650 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is SunAudio.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • -3dB (resp. -6db) point v.s. reference is at 71.3Hz (resp. 61.7Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 0.8dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.72 and would be 9.43 with a perfect subwoofer.
      • Details: NBD: ON 0.111, LW 0.102, SP 0.12, PIR 0.088; SM: SP0.986, PIR0.987; LFQ 0.537, LFX 61Hz
  • Link to Original review.
  • Note: Sun Audio Purified 4 XP25B Woofer: BW12 @ 2126Hz Tweeter: BW12 @ 4157Hz. Measurements done at 2.5 meter..
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