What we know about the measurement:

ADS L520 is a passive bookshelves

  • Quality of the measurement data is low.
  • Origin of the data is Misc.
  • Format of the data is a set of 36 horizontal and 36 vertical measurements .
  • Sensitivity: 94.4dB (avg. 100Hz-1kHz for 2.83V measured at 1m).
  • -3dB (resp. -6db) point v.s. reference is at 51.1Hz (resp. 42.4Hz).
  • Reference level is normalised to -0.8dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 8.2dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-70.0°, 70.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-20.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 4.44 and would be 6.42 with a perfect subwoofer.
      • Details: NBD: ON 0.641, LW 0.572, SP 0.516, PIR 0.499; SM: SP0.87, PIR0.787; LFQ 1.312, LFX 41Hz
    • Tonality (Preference) Score is 5.57 with an EQ and would be 7.28 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.523, LW 0.457, SP 0.445, PIR 0.412; SM: SP0.935, PIR0.923; LFQ 1.312, LFX 36Hz
  • Link to original Review: asr review. .
  • Vendor specifications:
    • Sensitivity 92 dB
    • Impedance 6 Ohm
    • Size
      • Width 298mm
      • Height 517mm
      • Depth 241 mm)
    • Weight 14.0 kg
ADS L520
AutomaticEQ (IIR)
Set preamp gain to: -2.8dB.
Type Freq Q Gain
3 36.0 0.77 3.0
3 85.0 1.99 -3.38
3 139.0 1.36 -1.08
3 310.0 2.82 -0.94
3 849.0 2.97 -1.28
3 1161.0 2.94 1.8
3 13652.0 0.5 -2.62
Download

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

ADS L520 filters_auto_eq

AutomaticEQ

ADS L520 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
Frequency Frequency with EQ
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