What we know about the measurement:

JBL Stage A120 is a passive bookshelves that cost around 200 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: 82.8dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 74.7Hz (resp. 63.0Hz).
  • Reference level is normalised to 0.5dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 2.84 and would be 5.59 with a perfect subwoofer.
      • Details: NBD: ON 0.466, LW 0.401, SP 0.37, PIR 0.37; SM: SP0.453, PIR0.076; LFQ 0.299, LFX 62Hz
    • Tonality (Preference) Score is 5.99 with an EQ and would be 8.41 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.278, LW 0.227, SP 0.308, PIR 0.23; SM: SP0.931, PIR0.91; LFQ 0.299, LFX 52Hz
  • Link to original Review: eac review. .
JBL Stage A120
AutomaticEQ (IIR)
Set preamp gain to: -2.5dB.
Type Freq Q Gain
3 56.0 1.15 2.99
3 130.0 1.31 -3.71
3 270.0 1.37 1.34
3 643.0 0.81 2.77
3 1954.0 2.98 2.96
3 2094.0 0.38 -3.11
3 13186.0 0.61 -6.47
Download

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

JBL Stage A120 filters_auto_eq

AutomaticEQ

JBL Stage A120 filters_eq_full

Target v.s. EQ

JBL Stage A120
Graphic EQ 15 bands
Set preamp gain to: -0.3dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.25
3 100.0 2.14 -0.25
3 160.0 2.14 -0.25
3 250.0 2.14 0.0
3 400.0 2.14 0.25
3 630.0 2.14 0.25
3 1000.0 2.14 0.0
3 1600.0 2.14 -0.25
3 2500.0 2.14 -0.25
3 4000.0 2.14 -0.5
3 6300.0 2.14 -0.25
3 10000.0 2.14 -0.75
3 16000.0 2.14 -0.5
Download

These EQ is designed for a 15 bands graphical EQ.

JBL Stage A120
Graphic EQ 31 bands
Set preamp gain to: -0.4dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.25
3 31.0 4.32 0.25
3 40.0 4.32 0.25
3 50.0 4.32 0.25
3 63.0 4.32 0.25
3 80.0 4.32 0.25
3 100.0 4.32 -0.25
3 125.0 4.32 -0.5
3 160.0 4.32 -0.25
3 200.0 4.32 -0.25
3 250.0 4.32 0.0
3 315.0 4.32 0.25
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 0.0
3 1000.0 4.32 0.0
3 1250.0 4.32 -0.5
3 1600.0 4.32 -0.25
3 2000.0 4.32 -0.25
3 2500.0 4.32 -0.5
3 3150.0 4.32 -0.5
3 4000.0 4.32 -0.5
3 5000.0 4.32 -0.5
3 6300.0 4.32 -0.5
3 8000.0 4.32 -0.75
3 10000.0 4.32 -1.0
3 12000.0 4.32 -1.0
3 16000.0 4.32 -1.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

JBL Stage A120: comparison between EQs
JBL Stage A120

Comparison betweens various EQs

JBL Stage A120

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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