What we know about the measurement:

JBL CBT 70J-1 is a passive cbt that cost around 1000 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • -3dB (resp. -6db) point v.s. reference is at 120.1Hz (resp. 71.8Hz).
  • Reference level is normalised to 0.1dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 4.0dB over the same frequency range.
  • 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 2.91 and would be 5.83 with a perfect subwoofer.
      • Details: NBD: ON 0.649, LW 0.573, SP 0.499, PIR 0.495; SM: SP0.772, PIR0.538; LFQ 1.219, LFX 68Hz
    • Tonality (Preference) Score is 4.9 with an EQ and would be 7.65 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.448, LW 0.374, SP 0.363, PIR 0.323; SM: SP0.888, PIR0.887; LFQ 0.991, LFX 62Hz
  • Link to Original review.
JBL CBT 70J-1
AutomaticEQ (IIR)
Set preamp gain to: -3.0dB.
Type Freq Q Gain
PK 95.0 1.49 2.99
PK 321.0 3.0 1.87
PK 522.0 2.98 2.33
PK 910.0 2.99 -3.42
PK 2023.0 2.8 2.08
PK 5732.0 0.61 -3.71
PK 16239.0 0.26 2.95
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
JBL CBT 70J-1
Graphic EQ 15 bands
Set preamp gain to: -1.1dB.
Type Freq Q Gain
PK 25.0 2.14 0.75
PK 40.0 2.14 0.75
PK 63.0 2.14 0.75
PK 100.0 2.14 0.75
PK 160.0 2.14 0.25
PK 250.0 2.14 0.25
PK 400.0 2.14 0.5
PK 630.0 2.14 0.25
PK 1000.0 2.14 -0.25
PK 1600.0 2.14 0.25
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 0.75
Download
This EQ is designed for a 15 bands graphical EQ.
JBL CBT 70J-1
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.5
PK 31.0 4.32 0.5
PK 40.0 4.32 0.5
PK 50.0 4.32 0.5
PK 63.0 4.32 0.5
PK 80.0 4.32 0.5
PK 100.0 4.32 0.5
PK 125.0 4.32 0.5
PK 160.0 4.32 0.25
PK 200.0 4.32 0.25
PK 250.0 4.32 0.25
PK 315.0 4.32 0.5
PK 400.0 4.32 0.25
PK 500.0 4.32 0.5
PK 630.0 4.32 0.25
PK 800.0 4.32 0.0
PK 1000.0 4.32 0.0
PK 1250.0 4.32 0.25
PK 1600.0 4.32 0.25
PK 2000.0 4.32 0.25
PK 2500.0 4.32 0.0
PK 3150.0 4.32 0.0
PK 4000.0 4.32 0.0
PK 5000.0 4.32 0.0
PK 6300.0 4.32 0.0
PK 8000.0 4.32 0.25
PK 10000.0 4.32 0.25
PK 12000.0 4.32 0.5
PK 16000.0 4.32 0.75
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 CBT 70J-1: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
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