What we know about the measurement:

QSC K12.2 is an active liveportable that cost around 870 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 54.5Hz (resp. 48.7Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 1.2dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-50.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-40.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 5.9 and would be 8.17 with a perfect subwoofer.
      • Details: NBD: ON 0.299, LW 0.261, SP 0.329, PIR 0.269; SM: SP0.921, PIR0.881; LFQ 1.327, LFX 48Hz
    • Tonality (Preference) Score is 7.14 with an EQ and would be 9.26 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.108, LW 0.089, SP 0.194, PIR 0.123; SM: SP0.943, PIR0.957; LFQ 1.293, LFX 45Hz
  • Note: Data provided by QSC is of good quality but highly smoothed.
QSC K12.2
AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
3 44.0 2.42 2.88
3 54.0 2.73 2.84
3 98.0 0.77 -4.6
3 190.0 1.68 2.87
3 395.0 2.97 -0.7
3 4194.0 1.02 -3.43
3 5165.0 0.3 2.01
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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 K12.2 filters_auto_eq

AutomaticEQ

QSC K12.2 filters_eq_full

Target v.s. EQ

QSC K12.2
Graphic EQ 15 bands
Set preamp gain to: -0.8dB.
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 0.0
3 250.0 2.14 0.0
3 400.0 2.14 0.0
3 630.0 2.14 0.25
3 1000.0 2.14 0.25
3 1600.0 2.14 0.5
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 0.75
Download

These EQ is designed for a 15 bands graphical EQ.

QSC K12.2
Graphic EQ 31 bands
Set preamp gain to: -1.0dB.
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 0.0
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 0.0
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 0.5
3 1600.0 4.32 0.5
3 2000.0 4.32 0.5
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 0.25
3 6300.0 4.32 0.25
3 8000.0 4.32 0.5
3 10000.0 4.32 0.5
3 12000.0 4.32 0.5
3 16000.0 4.32 1.0
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

QSC K12.2: comparison between EQs
QSC K12.2

Comparison betweens various EQs

QSC K12.2

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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