What we know about the measurement:

Audio First Design Fidelia is a passive bookshelves that cost around 1200 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 .
  • -3dB (resp. -6db) point v.s. reference is at 52.7Hz (resp. 45.4Hz).
  • 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.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 6.52 and would be 8.53 with a perfect subwoofer.
      • Details: NBD: ON 0.279, LW 0.236, SP 0.255, PIR 0.208; SM: SP0.96, PIR0.935; LFQ 0.462, LFX 42Hz
    • Tonality (Preference) Score is 6.59 with an EQ and would be 8.36 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.29, LW 0.245, SP 0.239, PIR 0.204; SM: SP0.934, PIR0.867; LFQ 0.462, LFX 37Hz
  • Link to original Review: yt review. .
  • Vendor specifications:
    • Sensitivity 84 dB
    • Impedance 3.2 Ohm
    • Size
      • Width 180mm
      • Height 300mm
      • Depth 297.6mm
    • Weight 6.8kg
Audio First Design Fidelia
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
PK 36.0 1.07 2.99
PK 98.0 1.21 -1.45
PK 211.0 0.68 -0.8
PK 621.0 2.97 -0.88
PK 1244.0 2.98 -0.73
PK 1823.0 2.86 -0.73
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
Improvement made by adding the above EQ
EQ
AutoEQ
Target v.s. EQ
Target v.s. EQ
Histogram of errors
On Axis (fullrange)
Listening Window (fullrange)
Predicted In-Room Response (fullrange)
;