What we know about the measurement:

Optimal Audio Cuboid 3 is a passive bookshelves that cost around 85 USD each.

  • Quality of the measurement data is low.
  • Origin of the data is Optimal Audio.
  • Format of the data is a GLL file .
  • Sensitivity:
    • Sensitivity: 74.0dB (avg. 100Hz-1kHz for 2.83V estimated at 1m).
    • Sensitivity: 54.0dB computed at the measurement distance (10.0m) over the same frequency range.
  • -3dB (resp. -6db) point v.s. reference is at 115.0Hz (resp. 97.5Hz).
  • Reference level is normalised to 0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 6.8dB over the same frequency range.
  • Directivity
    • Horizontal directivity is (-10.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
    • Vertical directivity is (-30.0°, 10.0°) between 1kHz and 10kHz. Angle computed for +/-6dB.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is -0.46 and would be 3.15 with a perfect subwoofer.
      • Details: NBD: ON 0.809, LW 0.816, SP 0.893, PIR 0.842; SM: SP0.062, PIR0.003; LFQ 0.482, LFX 100Hz
    • Tonality (Preference) Score is 3.37 with an EQ and would be 6.68 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.46, LW 0.46, SP 0.552, PIR 0.497; SM: SP0.801, PIR0.705; LFQ 0.37, LFX 85Hz
  • Vendor specifications:
    • Dispersion: 130° horizontal and 120° vertical.
    • Sensitivity 84 dB
    • Impedance 16 Ohm
    • Size
      • Width 120mm
      • Height 190mm
      • Depth 118 mm)
    • Weight 1.26 kg
Optimal Audio Cuboid 3
AutomaticEQ (IIR)
Set preamp gain to: -3.4dB.
Type Freq Q Gain
3 98.0 1.82 3.0
3 235.0 1.22 -3.74
3 1429.0 2.2 -2.35
3 2324.0 1.49 3.0
3 2765.0 2.2 3.0
3 11085.0 0.41 -8.33
3 13186.0 2.9 -8.93
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These EQ optimise the Harman score and is a good start for far field listening like in your living room.

Optimal Audio Cuboid 3 filters_auto_eq

AutomaticEQ

Optimal Audio Cuboid 3 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
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