What we know about the measurement:

JBL L52 Classic is a passive bookshelves that cost around 1000 USD each.

  • 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 64.5Hz (resp. 54.2Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.6dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.66 and would be 7.08 with a perfect subwoofer.
      • Details: NBD: ON 0.522, LW 0.419, SP 0.385, PIR 0.364; SM: SP0.895, PIR0.77; LFQ 0.857, LFX 52Hz
    • Tonality (Preference) Score is 6.01 with an EQ and would be 8.24 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.381, LW 0.292, SP 0.292, PIR 0.228; SM: SP0.943, PIR0.945; LFQ 0.761, LFX 47Hz
  • Link to original Review: eac review. Links to other reviews: yt review .
  • Vendor specifications:
    • Sensitivity 85 dB
    • Impedance 4 Ohm
    • Size
      • Width 197mm
      • Height 330mm
      • Depth 216mm
    • Weight 5kg
JBL L52 Classic
AutomaticEQ (IIR)
Set preamp gain to: -2.2dB.
Type Freq Q Gain
PK 54.0 1.0 2.97
PK 98.0 1.35 -3.74
PK 260.0 0.83 1.04
PK 849.0 2.95 2.17
PK 1429.0 1.62 -1.83
PK 3779.0 2.36 -1.48
PK 5536.0 2.97 0.75
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
JBL L52 Classic
AutomaticEQ LW (IIR)
Set preamp gain to: -1.9dB.
Type Freq Q Gain
PK 65.0 3.0 2.98
PK 98.0 1.51 -2.92
PK 227.0 2.94 1.21
PK 321.0 2.96 0.53
PK 792.0 2.72 1.9
PK 1586.0 2.42 -1.97
PK 10707.0 0.55 1.43
Download
This EQ optimise for a flat listening window and is a good start for near field listening like on your desk.
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)
JBL L52 Classic: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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