What we know about the measurement:

Elac BS 41 is a passive bookshelves that cost around 180 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 81.8dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 54.2Hz (resp. 52.7Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.5dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.63 and would be 6.92 with a perfect subwoofer.
      • Details: NBD: ON 0.554, LW 0.432, SP 0.417, PIR 0.377; SM: SP0.884, PIR0.752; LFQ 0.381, LFX 49Hz
    • Tonality (Preference) Score is 5.63 with an EQ and would be 7.85 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.491, LW 0.358, SP 0.288, PIR 0.252; SM: SP0.969, PIR0.928; LFQ 0.533, LFX 47Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
Elac BS 41
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
PK 44.0 2.98 2.98
PK 117.0 1.04 -1.39
PK 522.0 2.97 1.44
PK 1244.0 2.56 2.65
PK 1887.0 3.0 3.0
PK 2964.0 0.25 -2.35
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Elac BS 41 filters_auto_eq

AutomaticEQ

Elac BS 41 filters_eq_full

Target v.s. EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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