What we know about the measurement:

JBL PRX912 is an active liveportable that cost around 1000 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is JBL.
  • Format of the data is a GLL file .
  • -3dB (resp. -6db) point v.s. reference is at 63.0Hz (resp. 56.0Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-40.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 3.91 and would be 6.39 with a perfect subwoofer.
      • Details: NBD: ON 0.48, LW 0.523, SP 0.773, PIR 0.619; SM: SP0.838, PIR0.756; LFQ 1.475, LFX 54Hz
    • Tonality (Preference) Score is 5.33 with an EQ and would be 7.6 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.315, LW 0.361, SP 0.64, PIR 0.469; SM: SP0.923, PIR0.906; LFQ 1.475, LFX 48Hz
  • Link to Original review.
  • Vendor specifications:
    • Dispersion: 90° horizontal and 50° vertical.
    • SPL
      • max: 132 dB
    • Size
      • Width 394mm
      • Height 636mm
      • Depth 332 mm)
    • Weight 19.5 kg
JBL PRX912
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 51.0 1.7 2.97
3 95.0 2.24 -5.12
3 211.0 0.68 2.77
3 289.0 2.95 -2.39
3 439.0 1.94 -1.97
3 3405.0 0.67 0.95
3 9001.0 1.84 -2.68
Download

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

JBL PRX912 filters_auto_eq

AutomaticEQ

JBL PRX912 filters_eq_full

Target v.s. EQ

JBL PRX912
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.25
3 100.0 2.14 -0.5
3 160.0 2.14 0.25
3 250.0 2.14 0.25
3 400.0 2.14 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 0.25
3 1600.0 2.14 0.5
3 2500.0 2.14 0.5
3 4000.0 2.14 0.5
3 6300.0 2.14 0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 0.5
Download

These EQ is designed for a 15 bands graphical EQ.

JBL PRX912
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.5
3 31.0 4.32 0.5
3 40.0 4.32 0.5
3 50.0 4.32 0.5
3 63.0 4.32 0.5
3 80.0 4.32 -0.25
3 100.0 4.32 -0.5
3 125.0 4.32 0.0
3 160.0 4.32 0.25
3 200.0 4.32 0.25
3 250.0 4.32 0.25
3 315.0 4.32 0.0
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 0.25
3 800.0 4.32 0.0
3 1000.0 4.32 0.5
3 1250.0 4.32 0.25
3 1600.0 4.32 0.5
3 2000.0 4.32 0.5
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 0.25
3 10000.0 4.32 0.25
3 12000.0 4.32 0.25
3 16000.0 4.32 0.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

JBL PRX912: comparison between EQs
JBL PRX912

Comparison betweens various EQs

JBL PRX912

Improvements made by EQ
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
CEA2034
On Axis
Early Reflections
Estimated In-Room Response
Horizontal Reflections
Vertical Reflections
SPL Horizontal
SPL Vertical
SPL Horizontal Normalized
SPL Vertical Normalized
SPL Horizontal Contour
SPL Vertical Contour
SPL Horizontal Contour Normalized
SPL Vertical Contour Normalized
SPL Horizontal Contour 3D
SPL Vertical Contour 3D
SPL Horizontal Contour Normalized 3D
SPL Vertical Contour Normalized 3D
SPL Horizontal Radar
SPL Vertical Radar
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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