What we know about the measurement:

JBL Stage A135C is a passive center that cost around 300 USD

  • 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 128.9Hz (resp. 108.4Hz).
  • Reference level is normalised to 0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.6dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 0.66 and would be 4.42 with a perfect subwoofer.
      • Details: NBD: ON 0.68, LW 0.566, SP 0.55, PIR 0.523; SM: SP0.27, PIR0.0; LFQ 1.461, LFX 108Hz
    • Tonality (Preference) Score is 3.17 with an EQ and would be 6.7 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.599, LW 0.486, SP 0.489, PIR 0.447; SM: SP0.893, PIR0.796; LFQ 1.225, LFX 95Hz
  • Vertical measurement
  • Link to Original review.
JBL Stage A135C
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
PK 98.0 1.67 3.0
PK 211.0 1.77 -2.29
PK 976.0 3.0 1.8
PK 2491.0 0.82 0.52
PK 3068.0 2.91 -2.94
PK 4495.0 2.99 -2.2
PK 11882.0 0.5 -6.34
Download
This EQ optimise the Harman score and is a good start for far field listening like in your living room.
JBL Stage A135C
AutomaticEQ LW (IIR)
Set preamp gain to: -2.6dB.
Type Freq Q Gain
PK 128.0 2.87 2.94
PK 221.0 1.71 -1.55
PK 903.0 1.73 2.66
PK 2380.0 2.0 2.0
PK 3110.0 1.51 -1.76
PK 10713.0 2.04 -2.92
PK 15474.0 2.97 -2.97
Download
This EQ optimise for a flat listening window and is a good start for near field listening like on your desk.
JBL Stage A135C
AutomaticEQ Score (IIR)
Set preamp gain to: -2.5dB.
Type Freq Q Gain
PK 128.0 0.77 2.33
PK 128.0 1.08 1.23
PK 200.0 1.23 -3.0
PK 1032.0 1.08 2.82
PK 2226.0 2.66 2.11
PK 7669.0 0.26 -2.93
PK 14965.0 0.85 -2.95
Download
JBL Stage A135C
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
PK 25.0 2.14 0.5
PK 40.0 2.14 0.5
PK 63.0 2.14 0.5
PK 100.0 2.14 0.5
PK 160.0 2.14 0.0
PK 250.0 2.14 0.0
PK 400.0 2.14 0.25
PK 630.0 2.14 0.25
PK 1000.0 2.14 0.5
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 -0.5
PK 10000.0 2.14 -0.75
PK 16000.0 2.14 -0.5
Download
This EQ is designed for a 15 bands graphical EQ.
JBL Stage A135C
Graphic EQ 31 bands
Set preamp gain to: -0.4dB.
Type Freq Q Gain
PK 20.0 4.32 0.0
PK 25.0 4.32 0.25
PK 31.0 4.32 0.25
PK 40.0 4.32 0.25
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 0.0
PK 400.0 4.32 0.0
PK 500.0 4.32 -0.25
PK 630.0 4.32 0.0
PK 800.0 4.32 0.0
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 -0.5
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 -0.5
PK 10000.0 4.32 -0.75
PK 12000.0 4.32 -0.5
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 Stage A135C: comparison between EQs
AutomaticEQ
Target v.s. EQ
Comparison betweens various EQs
;