What we know about the measurement:

JBL Synthesis 4429 is a passive bookshelves that cost around 6000 USD for a pair.

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • Sensitivity: 90.4dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 45.9Hz (resp. 37.8Hz).
  • Reference level is normalised to 0.6dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.0dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.77 and would be 6.56 with a perfect subwoofer.
      • Details: NBD: ON 0.687, LW 0.491, SP 0.491, PIR 0.453; SM: SP0.884, PIR0.841; LFQ 1.804, LFX 37Hz
    • Tonality (Preference) Score is 6.04 with an EQ and would be 7.63 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.552, LW 0.315, SP 0.388, PIR 0.274; SM: SP0.894, PIR0.925; LFQ 1.65, LFX 33Hz
  • Link to Original review.
JBL Synthesis 4429
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 34.0 1.22 2.99
3 85.0 1.39 -2.1
3 219.0 2.14 2.85
3 260.0 1.4 -3.39
3 1700.0 2.98 -1.3
3 4818.0 3.0 -2.47
3 8110.0 2.99 2.98
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

JBL Synthesis 4429 filters_auto_eq

AutomaticEQ

JBL Synthesis 4429 filters_eq_full

Target v.s. EQ

JBL Synthesis 4429
Graphic EQ 15 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 -0.25
3 100.0 2.14 -0.25
3 160.0 2.14 0.0
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 -0.25
3 2500.0 2.14 0.25
3 4000.0 2.14 0.0
3 6300.0 2.14 0.25
3 10000.0 2.14 0.25
3 16000.0 2.14 0.0
Download

These EQ is designed for a 15 bands graphical EQ.

JBL Synthesis 4429
Graphic EQ 31 bands
Set preamp gain to: -0.9dB.
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 0.25
3 63.0 4.32 0.0
3 80.0 4.32 -0.25
3 100.0 4.32 -0.25
3 125.0 4.32 0.0
3 160.0 4.32 0.0
3 200.0 4.32 0.25
3 250.0 4.32 0.0
3 315.0 4.32 0.0
3 400.0 4.32 0.0
3 500.0 4.32 0.25
3 630.0 4.32 0.25
3 800.0 4.32 0.25
3 1000.0 4.32 0.25
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 0.25
3 3150.0 4.32 0.25
3 4000.0 4.32 0.25
3 5000.0 4.32 0.0
3 6300.0 4.32 0.5
3 8000.0 4.32 0.75
3 10000.0 4.32 0.5
3 12000.0 4.32 0.5
3 16000.0 4.32 0.25
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

JBL Synthesis 4429: comparison between EQs
JBL Synthesis 4429

Comparison betweens various EQs

JBL Synthesis 4429

Improvements made by EQ

Frequency Frequency with EQ
Frequency Frequency with EQ
Frequency Frequency with EQ
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