What we know about the measurement:

LOGProfessional Alpha is an active bookshelves that cost around 5930 USD for a pair.

  • Quality of the measurement data is medium.
  • Origin of the data is Sound and Recording.
  • Format of the data is a scanned image .
  • -3dB (resp. -6db) point v.s. reference is at 67.1Hz (resp. 51.9Hz).
  • Reference level is normalised to 0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.2dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.91 and would be 8.24 with a perfect subwoofer.
      • Details: NBD: ON 0.18, LW 0.184, SP 0.34, PIR 0.238; SM: SP0.811, PIR0.743; LFQ 0.965, LFX 50Hz
    • Tonality (Preference) Score is 6.9 with an EQ and would be 8.73 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.163, LW 0.167, SP 0.328, PIR 0.223; SM: SP0.91, PIR0.915; LFQ 0.809, LFX 38Hz
  • Link to original Review: snr review. .
  • Vendor specifications:
    • Size
      • Width 220mm
      • Height 340mm
      • Depth 220 mm)
    • Weight 7.0 kg
LOGProfessional Alpha
AutomaticEQ (IIR)
Set preamp gain to: -4.4dB.
Type Freq Q Gain
3 40.0 1.12 2.98
3 69.0 0.44 2.29
3 92.0 1.71 -2.21
3 121.0 0.96 -1.75
3 310.0 1.16 -1.02
3 1333.0 2.98 -1.01
3 9648.0 0.5 -2.34
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

LOGProfessional Alpha filters_auto_eq

AutomaticEQ

LOGProfessional Alpha filters_eq_full

Target v.s. EQ
CEA2034
On Axis
Estimated In-Room Response
CEA2034
On Axis
Estimated In-Room Response
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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