What we know about the measurement:

JBL SCS 8 is a passive surround that cost around 600 USD each.

  • Quality of the measurement data is high.
  • Origin of the data is ErinsAudioCorner.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 90.2dB (avg. 100Hz-1kHz for 2.83V estimated at 1m)
  • -3dB (resp. -6db) point v.s. reference is at 87.9Hz (resp. 77.6Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 6.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-40.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Note: The tonality (Preference) score does not make sense for surround speakers. Don't give too much credits to the value.
    • Tonality (Preference) Score is -1.87 and would be 1.27 with a perfect subwoofer.
      • Details: NBD: ON 1.811, LW 1.008, SP 1.001, PIR 0.909; SM: SP0.633, PIR0.352; LFQ 1.389, LFX 77Hz
    • Tonality (Preference) Score is 0.87 with an EQ and would be 3.75 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 1.368, LW 0.697, SP 0.914, PIR 0.733; SM: SP0.832, PIR0.719; LFQ 1.171, LFX 67Hz
  • Link to original Review: eac review. .
  • Vendor specifications:
    • Dispersion: 120° horizontal and 120° vertical.
    • Sensitivity 94 dB
    • Impedance 8 Ohm
    • SPL
      • max: 118 dB
    • Size
      • Width 300mm
      • Height 300mm
      • Depth 305 mm)
    • Weight 11.4 kg
JBL SCS 8
AutomaticEQ (IIR)
Set preamp gain to: -3.6dB.
Type Freq Q Gain
3 77.0 2.33 3.0
3 125.0 1.36 -6.43
3 130.0 0.26 2.97
3 600.0 3.0 2.99
3 739.0 2.99 -4.17
3 6585.0 3.0 -5.36
3 10707.0 2.74 -6.51
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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 SCS 8 filters_auto_eq

AutomaticEQ

JBL SCS 8 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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