What we know about the measurement:

JBL Control 24CT is a passive inwall that cost around 150 USD each.

  • Quality of the measurement data is low.
  • Origin of the data is JBL.
  • Format of the data is a GLL file .
  • -3dB (resp. -6db) point v.s. reference is at 22.4Hz (resp. 22.4Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.5dB over the same frequency range.
  • Tonality (Preference) Score
    • Note: The tonality (Preference) score does not make sense for inwall speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is 7.07 and would be 8.37 with a perfect subwoofer.
      • Details: NBD: ON 0.131, LW 0.127, SP 0.2, PIR 0.152; SM: SP0.754, PIR0.635; LFQ 4.227, LFX 29Hz
    • Tonality (Preference) Score is 8.69 with an EQ and would be 9.51 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.046, LW 0.027, SP 0.123, PIR 0.067; SM: SP0.868, PIR0.923; LFQ 4.227, LFX 22Hz
  • Link to original Review: jbl review. .
  • Note: Data provided by JBL in GLL format is highly variable, beware. It ranges from excellent to surprising.
JBL Control 24CT
AutomaticEQ (IIR)
Set preamp gain to: -1.3dB.
Type Freq Q Gain
PK 74.0 0.25 1.4
PK 243.0 1.25 -1.81
PK 395.0 1.07 -1.29
PK 1700.0 0.82 0.54
PK 4051.0 1.21 -0.45
PK 11085.0 0.41 -2.06
PK 16239.0 0.33 1.77
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
JBL Control 24CT
Graphic EQ 15 bands
Set preamp gain to: -0.9dB.
Type Freq Q Gain
PK 25.0 2.14 0.75
PK 40.0 2.14 0.5
PK 63.0 2.14 0.25
PK 100.0 2.14 0.25
PK 160.0 2.14 0.0
PK 250.0 2.14 -0.25
PK 400.0 2.14 -0.25
PK 630.0 2.14 -0.25
PK 1000.0 2.14 0.0
PK 1600.0 2.14 0.0
PK 2500.0 2.14 0.0
PK 4000.0 2.14 -0.25
PK 6300.0 2.14 -0.25
PK 10000.0 2.14 -0.25
PK 16000.0 2.14 0.0
Download
This EQ is designed for a 15 bands graphical EQ.
JBL Control 24CT
Graphic EQ 31 bands
Set preamp gain to: -0.9dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.75
PK 31.0 4.32 0.5
PK 40.0 4.32 0.5
PK 50.0 4.32 0.25
PK 63.0 4.32 0.25
PK 80.0 4.32 0.25
PK 100.0 4.32 0.25
PK 125.0 4.32 0.25
PK 160.0 4.32 0.0
PK 200.0 4.32 -0.25
PK 250.0 4.32 -0.25
PK 315.0 4.32 -0.25
PK 400.0 4.32 -0.25
PK 500.0 4.32 -0.25
PK 630.0 4.32 -0.25
PK 800.0 4.32 -0.25
PK 1000.0 4.32 -0.25
PK 1250.0 4.32 0.0
PK 1600.0 4.32 0.0
PK 2000.0 4.32 0.0
PK 2500.0 4.32 -0.25
PK 3150.0 4.32 -0.25
PK 4000.0 4.32 -0.25
PK 5000.0 4.32 -0.25
PK 6300.0 4.32 -0.25
PK 8000.0 4.32 -0.25
PK 10000.0 4.32 -0.25
PK 12000.0 4.32 -0.25
PK 16000.0 4.32 -0.25
PK 20000.0 4.32 0.0
Download
This EQ is designed for a 31 bands graphical EQ.
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 Control 24CT: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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