What we know about the measurement:

JBL Control 25T is a passive outdoor that cost around 350 USD for a pair.

  • Quality of the measurement data is low.
  • Origin of the data is JBL.
  • Format of the data is a GLL file .
  • Sensitivity: 110.6dB (avg. 100Hz-1kHz for 2.83V estimated at 1m) . Sensitivity computed at the measurement distance (10m) over the same frequency range: 90.6dB.
  • -3dB (resp. -6db) point v.s. reference is at 150.0Hz (resp. 128.0Hz).
  • Reference level is normalised to 0.3dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.4dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-40.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is -0.09 and would be 4.28 with a perfect subwoofer.
      • Details: NBD: ON 0.629, LW 0.613, SP 0.625, PIR 0.612; SM: SP0.099, PIR0.0; LFQ 1.728, LFX 150Hz
    • Tonality (Preference) Score is 1.69 with an EQ and would be 5.77 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.454, LW 0.458, SP 0.551, PIR 0.491; SM: SP0.476, PIR0.296; LFQ 2.126, LFX 127Hz
  • Note: Data provided by JBL in GLL format is highly variable, beware. It ranges from excellent to surprising.
JBL Control 25T
AutomaticEQ (IIR)
Set preamp gain to: -2.2dB.
Type Freq Q Gain
5 739.0 0.64 2.96
3 3008.0 0.77 0.52
3 3555.0 0.33 -1.43
3 4803.0 2.66 -1.2
3 6489.0 2.03 -2.29
3 7930.0 1.66 -1.53
3 9372.0 2.09 -1.21
3 13092.0 1.45 2.98
5 15474.0 0.53 -0.71
Download

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

JBL Control 25T filters_auto_eq

AutomaticEQ

JBL Control 25T filters_eq_full

Target v.s. EQ

JBL Control 25T
Graphic EQ 15 bands
Set preamp gain to: -1.5dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.5
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 0.25
3 630.0 2.14 0.0
3 1000.0 2.14 -0.25
3 1600.0 2.14 0.0
3 2500.0 2.14 0.0
3 4000.0 2.14 -0.25
3 6300.0 2.14 -0.25
3 10000.0 2.14 0.25
3 16000.0 2.14 1.5
Download

These EQ is designed for a 15 bands graphical EQ.

JBL Control 25T
Graphic EQ 31 bands
Set preamp gain to: -1.3dB.
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 0.5
3 100.0 4.32 0.5
3 125.0 4.32 0.5
3 160.0 4.32 0.5
3 200.0 4.32 0.25
3 250.0 4.32 0.25
3 315.0 4.32 0.5
3 400.0 4.32 0.5
3 500.0 4.32 0.25
3 630.0 4.32 0.25
3 800.0 4.32 0.0
3 1000.0 4.32 0.0
3 1250.0 4.32 0.0
3 1600.0 4.32 0.0
3 2000.0 4.32 0.25
3 2500.0 4.32 0.0
3 3150.0 4.32 0.0
3 4000.0 4.32 0.0
3 5000.0 4.32 -0.25
3 6300.0 4.32 -0.5
3 8000.0 4.32 -0.25
3 10000.0 4.32 0.0
3 12000.0 4.32 0.5
3 16000.0 4.32 1.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

JBL Control 25T: comparison between EQs
JBL Control 25T

Comparison betweens various EQs

JBL Control 25T

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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