What we know about the measurement:

JBL CBT 1000+1000E is a passive cbt that cost around 5000 USD each.

  • Quality of the measurement data is low.
  • Origin of the data is JBL.
  • Format of the data is a GLL file .
  • Sensitivity: 111.2dB (avg. 100Hz-1kHz for 2.83V estimated at 1m) . Sensitivity computed at the measurement distance (10m) over the same frequency range: 91.2dB.
  • -3dB (resp. -6db) point v.s. reference is at 51.5Hz (resp. 45.0Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.4dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 60.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-10.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Note: The tonality (Preference) score does not make sense for cbt speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is 4.72 and would be 6.98 with a perfect subwoofer.
      • Details: NBD: ON 0.158, LW 0.136, SP 0.231, PIR 0.176; SM: SP0.419, PIR0.097; LFQ 3.359, LFX 48Hz
    • Tonality (Preference) Score is 7.24 with an EQ and would be 9.25 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.08, LW 0.08, SP 0.217, PIR 0.134; SM: SP0.928, PIR0.938; LFQ 3.142, LFX 42Hz
  • Note: Data provided by JBL in GLL format is highly variable, beware. It ranges from excellent to surprising.
  • Vendor specifications:
    • Dispersion: 160° horizontal and 60° vertical.
    • Sensitivity 102 dB
    • Impedance 4 Ohm
    • SPL
      • max: 127 dB
      • peak: 130 dB
      • pink_noise: 124 dB
    • Size
      • Width 250mm
      • Height 2040mm
      • Depth 345 mm)
    • Weight 47.2 kg
JBL CBT 1000+1000E
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 47.0 1.65 2.86
3 172.0 2.07 -1.66
3 820.0 1.89 1.01
3 1121.0 1.79 0.44
3 1954.0 2.85 -0.12
3 3289.0 2.86 -0.37
3 10341.0 0.47 -4.34
Download

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

JBL CBT 1000+1000E filters_auto_eq

AutomaticEQ

JBL CBT 1000+1000E filters_eq_full

Target v.s. 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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