What we know about the measurement:

SunAudio Purified 4 4XA25B Alu+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 .
  • Sensitivity:
    • Sensitivity: 85.6dB (avg. 100Hz-1kHz for 2.83V estimated at 1m).
    • Sensitivity: 77.6dB computed at the measurement distance (2.5m) over the same frequency range.
  • -3dB (resp. -6db) point v.s. reference is at 70.3Hz (resp. 61.7Hz).
  • Reference level is normalised to -0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.3dB 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°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.66 and would be 9.37 with a perfect subwoofer.
      • Details: NBD: ON 0.127, LW 0.078, SP 0.12, PIR 0.087; SM: SP0.979, PIR0.978; LFQ 0.489, LFX 61Hz
  • Link to Original review.
  • Note: Crossover Woofer: BW12 @ 2158Hz Tweeter: BW12 @ 4146Hz. Measurements done at 2.5 meter..
CEA2034
CEA2034 Normalized
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
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