What we know about the measurement:

Alcons Audio QRP20 90x15 is a passive columns

  • Quality of the measurement data is high.
  • Origin of the data is Alcons Audio.
  • Format of the data is a GLL file .
  • Sensitivity: 105.7dB (avg. 100Hz-1kHz for 2.83V estimated at 1m) . Sensitivity computed at the measurement distance (10m) over the same frequency range: 85.7dB.
  • -3dB (resp. -6db) point v.s. reference is at 90.0Hz (resp. 85.0Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 2.3dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-40.0°, 40.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 20.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.04 and would be 7.35 with a perfect subwoofer.
      • Details: NBD: ON 0.41, LW 0.371, SP 0.487, PIR 0.403; SM: SP0.919, PIR0.817; LFQ 1.252, LFX 85Hz
    • Tonality (Preference) Score is 5.2 with an EQ and would be 8.52 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.251, LW 0.216, SP 0.345, PIR 0.248; SM: SP0.978, PIR0.95; LFQ 1.252, LFX 85Hz
  • Link to original Review: psw review. Links to other reviews: axp review .
  • Vendor specifications:
    • Dispersion: 90° horizontal and 15° vertical.
    • Sensitivity 99 dB
    • Impedance 4 Ohm
    • SPL
      • peak: 133 dB
    • Size
      • Width 150mm
      • Height 742mm
      • Depth 150 mm)
    • Weight 12 kg
Alcons Audio QRP20 90x15
AutomaticEQ (IIR)
Set preamp gain to: -2.9dB.
Type Freq Q Gain
5 90.0 0.67 2.82
3 109.0 2.92 -2.97
3 153.0 1.78 -2.94
3 214.0 1.89 1.46
3 320.0 1.61 1.74
3 462.0 2.8 -1.42
3 529.0 2.11 2.56
3 2909.0 2.7 -1.64
3 11454.0 0.3 2.95
Download

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

Alcons Audio QRP20 90x15 filters_auto_eq

AutomaticEQ

Alcons Audio QRP20 90x15 filters_eq_full

Target v.s. EQ

Alcons Audio QRP20 90x15
Graphic EQ 15 bands
Set preamp gain to: -0.6dB.
Type Freq Q Gain
3 25.0 2.14 0.25
3 40.0 2.14 0.25
3 63.0 2.14 0.25
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 0.0
3 1000.0 2.14 0.0
3 1600.0 2.14 0.0
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 0.5
3 16000.0 2.14 0.5
Download

These EQ is designed for a 15 bands graphical EQ.

Alcons Audio QRP20 90x15
Graphic EQ 31 bands
Set preamp gain to: -0.7dB.
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 0.25
3 80.0 4.32 0.25
3 100.0 4.32 -0.25
3 125.0 4.32 -0.5
3 160.0 4.32 -0.25
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 0.25
3 500.0 4.32 0.5
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 0.0
3 1600.0 4.32 0.0
3 2000.0 4.32 0.0
3 2500.0 4.32 0.0
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 0.5
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 0.5
3 20000.0 4.32 0.0
Download

These EQ is designed for a 31 bands graphical EQ.

Alcons Audio QRP20 90x15: comparison between EQs
Alcons Audio QRP20 90x15

Comparison betweens various EQs

Alcons Audio QRP20 90x15

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
;