Optimal Audio Cuboid 12 is a passive bookshelves that cost around 760 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:
    • Company: 98 dB
    • Measured: 97.7 dB (avg. 300Hz-3kHz for 2.83V estimated at 1m).
    • Measured: 77.7 dB computed at the measurement distance (10.0m) over the same frequency range.
  • -3dB (resp. -6db) point v.s. reference is at 45.0Hz (resp. 40.0Hz).
  • Reference level is normalised to -0.4dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 6.6dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 2.57 and would be 4.47 with a perfect subwoofer.
      • Details: NBD: ON 0.854, LW 0.78, SP 0.878, PIR 0.818; SM: SP0.716, PIR0.587; LFQ 1.046, LFX 39Hz
    • Tonality (Preference) Score is 4.26 with an EQ and would be 5.88 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.724, LW 0.643, SP 0.706, PIR 0.644; SM: SP0.888, PIR0.833; LFQ 1.046, LFX 34Hz
Optimal Audio Cuboid 12

Vendor specifications

  • Dispersion: 80° horizontal and 50° vertical.
  • Impedance 8 Ohm
  • SPL
    • max: 123 dB
    • peak: 129 dB
  • Size
    • Width 360mm
    • Height 575mm
    • Depth 392mm
  • Weight 20.0kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 34.0 1.54 3.0
PK 77.0 1.98 -6.24
PK 117.0 1.61 -2.06
PK 560.0 2.7 -2.28
PK 2670.0 2.7 2.98
PK 7834.0 2.78 -2.98
PK 12736.0 0.63 -3.16
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This EQ optimise the Harman score and is a good start for far field listening like in your living room.
AutomaticEQ LW (IIR)
Set preamp gain to: -3.1dB.
Type Freq Q Gain
PK 77.0 1.81 -4.89
PK 125.0 0.97 -2.89
PK 579.0 0.4 1.24
PK 600.0 1.61 -3.31
PK 2964.0 2.1 3.0
PK 6585.0 2.99 2.27
PK 7834.0 1.24 -1.93
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This EQ optimise for a flat listening window and is a good start for near field listening like on your desk.
Quick config:
Quick config:
Quick config:
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