What we know about the measurement:

JBL Synthesis SK2-1000 is a passive bookshelves

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a scanned image .
  • Sensitivity: 93.2dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 79.2Hz (resp. 55.7Hz).
  • Reference level is normalised to 0.6dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.8dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.39 and would be 6.92 with a perfect subwoofer.
      • Details: NBD: ON 0.53, LW 0.326, SP 0.446, PIR 0.377; SM: SP0.827, PIR0.728; LFQ 2.538, LFX 56Hz
    • Tonality (Preference) Score is 5.5 with an EQ and would be 7.78 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.507, LW 0.28, SP 0.352, PIR 0.244; SM: SP0.907, PIR0.904; LFQ 2.538, LFX 49Hz
  • Link to Original review.
JBL Synthesis SK2-1000
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
6 99.0 0.67 -2.99
3 280.0 1.54 2.71
3 378.0 0.3 -3.0
3 739.0 1.47 2.07
3 1220.0 2.86 2.41
3 1948.0 2.85 1.65
3 3555.0 1.27 -0.56
3 6276.0 2.87 -0.81
5 14473.0 0.51 3.0
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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 SK2-1000 filters_auto_eq

AutomaticEQ

JBL Synthesis SK2-1000 filters_eq_full

Target v.s. EQ

JBL Synthesis SK2-1000
Graphic EQ 15 bands
Set preamp gain to: -0.7dB.
Type Freq Q Gain
3 25.0 2.14 0.5
3 40.0 2.14 0.5
3 63.0 2.14 0.5
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 0.0
3 630.0 2.14 0.0
3 1000.0 2.14 0.5
3 1600.0 2.14 0.25
3 2500.0 2.14 0.0
3 4000.0 2.14 0.0
3 6300.0 2.14 -0.25
3 10000.0 2.14 0.0
3 16000.0 2.14 -0.25
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These EQ is designed for a 15 bands graphical EQ.

JBL Synthesis SK2-1000
Graphic EQ 31 bands
Set preamp gain to: -0.8dB.
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 0.5
3 63.0 4.32 0.5
3 80.0 4.32 0.5
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 0.0
3 250.0 4.32 0.25
3 315.0 4.32 0.25
3 400.0 4.32 0.0
3 500.0 4.32 0.0
3 630.0 4.32 0.0
3 800.0 4.32 0.5
3 1000.0 4.32 0.5
3 1250.0 4.32 0.5
3 1600.0 4.32 0.25
3 2000.0 4.32 0.5
3 2500.0 4.32 0.25
3 3150.0 4.32 0.0
3 4000.0 4.32 0.25
3 5000.0 4.32 0.25
3 6300.0 4.32 0.0
3 8000.0 4.32 0.25
3 10000.0 4.32 0.25
3 12000.0 4.32 0.25
3 16000.0 4.32 0.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

JBL Synthesis SK2-1000: comparison between EQs
JBL Synthesis SK2-1000

Comparison betweens various EQs

JBL Synthesis SK2-1000

Improvements made by EQ

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