What we know about the measurement:

SunAudio Purified 4 4XA25A Alu+Alu is a passive bookshelves that cost around 3300 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: 71.3dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 71.3Hz (resp. 62.6Hz).
  • Reference level is normalised to -0.1dB 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°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.48 and would be 9.21 with a perfect subwoofer.
      • Details: NBD: ON 0.186, LW 0.114, SP 0.137, PIR 0.095; SM: SP0.981, PIR0.985; LFQ 0.489, LFX 62Hz
  • Link to Original review.
  • Note: Version with 25mm aluminium tweeter (BlieSMa T25A-6 tweeter) and aluminium woofer (Purifi PTT4.0X04-NLC-04). Crossovers are at 2200Hz and 4145Hz. Measurements are done with a Klippel NFS from https://www.dausend-acoustics.com/.
CEA2034
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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