What we know about the measurement:

Q Acoustics 3020i is a passive bookshelves that cost around 315 USD for a pair.

  • Quality of the measurement data is high.
  • Origin of the data is ASR.
  • Format of the data is generated by a Klippel NFS .
  • Sensitivity: 86.6dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 82.0Hz (resp. 60.1Hz).
  • Reference level is normalised to -0.0dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.0dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-60.0°, 50.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 30.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 3.91 and would be 6.43 with a perfect subwoofer.
      • Details: NBD: ON 0.481, LW 0.466, SP 0.481, PIR 0.436; SM: SP0.751, PIR0.541; LFQ 0.451, LFX 55Hz
    • Tonality (Preference) Score is 6.07 with an EQ and would be 8.21 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.363, LW 0.312, SP 0.319, PIR 0.244; SM: SP0.949, PIR0.934; LFQ 0.597, LFX 45Hz
  • Link to Original review.
Q Acoustics 3020i
AutomaticEQ (IIR)
Set preamp gain to: -4.8dB.
Type Freq Q Gain
5 99.0 1.01 2.97
3 309.0 0.27 -2.98
3 604.0 2.96 2.99
3 1394.0 2.01 -2.9
3 1762.0 2.55 2.91
3 4803.0 2.92 -2.81
3 6069.0 1.49 -2.41
3 11077.0 0.89 -2.89
5 14473.0 1.03 2.04
Download

These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Q Acoustics 3020i filters_auto_eq

AutomaticEQ

Q Acoustics 3020i filters_eq_full

Target v.s. EQ

Q Acoustics 3020i
flipflop@ASR (IIR)
Set preamp gain to: -3.5dB.
Type Freq Q Gain
3 305.0 3.0 -0.2
3 362.0 12.0 1.5
3 381.0 12.0 -1.2
3 536.0 18.0 0.5
3 651.0 5.0 9.0
3 676.0 5.0 -8.1
3 992.0 4.077 -2.3
3 1032.0 1.0 1.5
3 1349.0 4.998 -3.2
3 1560.0 10.0 -0.4
3 2087.0 1.018 2.9
3 2095.0 15.0 -1.1
3 2230.0 4.0 0.7
3 2390.0 17.0 -1.0
3 4852.0 1.733 -3.2
3 5650.0 6.0 0.6
3 6750.0 8.0 -1.0
3 7720.0 8.0 0.9
3 10101.0 1.0 -1.5
3 12900.0 7.0 -0.4
Download

These EQ is designed by ASR member flipflop.

Q Acoustics 3020i
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 -0.25
3 250.0 2.14 -0.25
3 400.0 2.14 -0.25
3 630.0 2.14 0.25
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 -0.5
3 6300.0 2.14 -0.5
3 10000.0 2.14 -0.5
3 16000.0 2.14 -0.5
Download

These EQ is designed for a 15 bands graphical EQ.

Q Acoustics 3020i
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 -0.25
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 -0.25
3 500.0 4.32 0.0
3 630.0 4.32 0.25
3 800.0 4.32 -0.25
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 0.0
3 2500.0 4.32 0.0
3 3150.0 4.32 -0.25
3 4000.0 4.32 -0.5
3 5000.0 4.32 -0.75
3 6300.0 4.32 -0.5
3 8000.0 4.32 -0.25
3 10000.0 4.32 -0.5
3 12000.0 4.32 -0.5
3 16000.0 4.32 -0.5
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Q Acoustics 3020i: comparison between EQs
Q Acoustics 3020i

Comparison betweens various EQs

Q Acoustics 3020i

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
Frequency Frequency with EQ
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