Optimal Audio Cuboid 8 is a passive bookshelves that cost around 490 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: 92 dB
    • Measured: 89.6 dB (avg. 300Hz-3kHz for 2.83V estimated at 1m).
    • Measured: 69.6 dB computed at the measurement distance (10.0m) over the same frequency range.
  • -3dB (resp. -6db) point v.s. reference is at 51.5Hz (resp. 45.0Hz).
  • Reference level is normalised to -0.2dB computed over the frequency range [300.0Hz, 5000.0Hz].
  • Frequency deviation is 3.5dB over the same frequency range.
  • Tonality (Preference) Score
    • Tonality (Preference) Score is 1.83 and would be 4.0 with a perfect subwoofer.
      • Details: NBD: ON 0.635, LW 0.688, SP 0.856, PIR 0.748; SM: SP0.041, PIR0.06; LFQ 0.413, LFX 46Hz
    • Tonality (Preference) Score is 4.33 with an EQ and would be 6.11 with a perfect subwoofer and the same EQ.
      • Details: NBD: ON 0.408, LW 0.418, SP 0.539, PIR 0.444; SM: SP0.21, PIR0.334; LFQ 0.413, LFX 37Hz
Optimal Audio Cuboid 8

Vendor specifications

  • Dispersion: 90° horizontal and 50° vertical.
  • Impedance 8 Ohm
  • Size
    • Width 256mm
    • Height 422mm
    • Depth 261mm
  • Weight 10.0kg

Directivity (-6dB)

AutomaticEQ (IIR)
Set preamp gain to: -2.7dB.
Type Freq Q Gain
PK 36.0 0.76 2.99
PK 130.0 1.2 -5.62
PK 879.0 2.99 -2.61
PK 3068.0 0.92 2.99
PK 4051.0 3.0 -2.82
PK 7308.0 0.98 -5.75
PK 13186.0 2.07 -7.04
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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: -2.2dB.
Type Freq Q Gain
PK 52.0 2.99 2.99
PK 67.0 3.0 -0.47
PK 134.0 1.3 -5.39
PK 879.0 2.99 -3.58
PK 3177.0 0.29 1.93
PK 6144.0 1.23 -3.48
PK 13186.0 2.39 -3.76
Download

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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