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 .
  • Sensitivity: 85.0dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -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.
  • Directivity
    • Horizontal directivity is (-40.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-40.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • 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 216 mm)
    • Weight 5 kg
JBL L52 Classic
AutomaticEQ (IIR)
Set preamp gain to: -2.2dB.
Type Freq Q Gain
3 54.0 1.0 2.97
3 98.0 1.35 -3.74
3 260.0 0.83 1.04
3 849.0 2.95 2.17
3 1429.0 1.62 -1.83
3 3779.0 2.36 -1.48
3 5536.0 2.97 0.75
Download

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

JBL L52 Classic filters_auto_eq

AutomaticEQ

JBL L52 Classic filters_eq_full

Target v.s. EQ

JBL L52 Classic
AutomaticEQ LW (IIR)
Set preamp gain to: -1.9dB.
Type Freq Q Gain
3 65.0 3.0 2.98
3 98.0 1.51 -2.92
3 227.0 2.94 1.21
3 321.0 2.96 0.53
3 792.0 2.72 1.9
3 1586.0 2.42 -1.97
3 10707.0 0.55 1.43
Download

These EQ optimise for a flat listening window and is a good start for near field listening like on your desk.

JBL L52 Classic: comparison between EQs
JBL L52 Classic

Comparison betweens various EQs

JBL L52 Classic

Improvements made by 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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