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. 52.7Hz).
  • 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 5.02 and would be 7.36 with a perfect subwoofer.
      • Details: NBD: ON 0.182, LW 0.186, SP 0.34, PIR 0.24; SM: SP0.208, PIR0.367; LFQ 0.957, LFX 50Hz
    • Tonality (Preference) Score is 6.02 with an EQ and would be 7.85 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.165, LW 0.169, SP 0.33, PIR 0.224; SM: SP0.304, PIR0.54; LFQ 0.802, LFX 38Hz
  • Link to original Review: snr review. .
LOGProfessional Alpha

Vendor specifications

  • Size
    • Width 220mm
    • Height 340mm
    • Depth 220mm
  • Weight 7.0kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -4.4dB.
Type Freq Q Gain
PK 40.0 1.12 2.98
PK 69.0 0.44 2.29
PK 92.0 1.71 -2.21
PK 121.0 0.96 -1.75
PK 310.0 1.16 -1.02
PK 1333.0 2.98 -1.01
PK 9648.0 0.5 -2.34
Download

This EQ optimise the Harman score and is a good start for far field listening like in your living room.

Quick config:
Quick config:
Quick config:
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