What we know about the measurement:

QSC K8.2 is an active liveportable that cost around 740 USD each.

  • Quality of the measurement data is low.
  • Origin of the data is QSC.
  • Format of the data is a GLL file .
  • -3dB (resp. -6db) point v.s. reference is at 58.0Hz (resp. 54.5Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.6dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-50.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.8 and would be 8.28 with a perfect subwoofer.
      • Details: NBD: ON 0.226, LW 0.197, SP 0.295, PIR 0.234; SM: SP0.867, PIR0.804; LFQ 0.066, LFX 54Hz
    • Tonality (Preference) Score is 6.83 with an EQ and would be 9.2 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.107, LW 0.089, SP 0.198, PIR 0.128; SM: SP0.931, PIR0.938; LFQ 0.066, LFX 51Hz
  • Note: Data provided by QSC is of good quality but highly smoothed.
QSC K8.2
AutomaticEQ (IIR)
Set preamp gain to: -2.3dB.
Type Freq Q Gain
3 56.0 2.83 2.99
3 98.0 1.31 -3.86
3 279.0 2.68 -0.57
3 849.0 1.25 -1.49
3 3068.0 0.33 1.68
3 8694.0 0.65 -4.82
3 16239.0 0.27 2.97
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

QSC K8.2 filters_auto_eq

AutomaticEQ

QSC K8.2 filters_eq_full

Target v.s. EQ

QSC K8.2
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 0.0
3 100.0 2.14 -0.5
3 160.0 2.14 -0.25
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 0.0
3 1600.0 2.14 0.25
3 2500.0 2.14 0.25
3 4000.0 2.14 0.25
3 6300.0 2.14 0.0
3 10000.0 2.14 -0.25
3 16000.0 2.14 0.5
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These EQ is designed for a 15 bands graphical EQ.

QSC K8.2
Graphic EQ 31 bands
Set preamp gain to: -0.4dB.
Type Freq Q Gain
3 20.0 4.32 0.0
3 25.0 4.32 0.25
3 31.0 4.32 0.25
3 40.0 4.32 0.25
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 -0.5
3 125.0 4.32 -0.5
3 160.0 4.32 -0.25
3 200.0 4.32 -0.25
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 0.0
3 1000.0 4.32 0.0
3 1250.0 4.32 0.0
3 1600.0 4.32 0.25
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 0.0
3 8000.0 4.32 -0.25
3 10000.0 4.32 0.0
3 12000.0 4.32 0.0
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.

QSC K8.2: comparison between EQs
QSC K8.2

Comparison betweens various EQs

QSC K8.2

Improvements made by 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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