Optimal Audio Cuboid 6


Full Range Passive 6.5″ Loudspeaker

  • Compact dimensions, exceptional performance
  • Mount portrait/landscape with flexibility
  • Max SPL: 105dB continuous, 111dB peak
  • Wide 130° x 120° coverage angle
  • IP54 rated, suitable for outdoors
  • Wall bracket included for installation
  • *Priced per speaker



The Optimal Audio Cuboid 6 is a compact yet powerful 6.5” passive loudspeaker, offering exceptional sound quality for various applications such as high-quality background music and clear speech reproduction. Its sleek design and included mounting hardware allow for easy installation in either portrait or landscape orientation. Additionally, it comes with a weatherproof terminal cover option for outdoor use, ensuring durability with an IP54 rating.

Featuring a 6.5” low-frequency driver and a 1” silk dome high-frequency driver with a shallow waveguide, the Optimal Audio Cuboid 6 ensures consistent distribution of high frequencies. To boost bass performance, it can be paired with the Sub 10, while amplification and optimal sound settings are provided by a SmartAmp or powered Zone, which also includes limiters to safeguard the drivers during louder playback.

For straightforward system setup and user control, the Cuboid 6 can be combined with Zone and WebApp, offering intuitive management. Additionally, ZonePad wall controllers can further enhance user interaction and control options.


Colour Options

Black, White

Maximum SPL


Watts (Peak)

240 W


8 ohms


1x 1” Silk Dome, neodymium motor system (HF), 1x 6.5” coated paper, ferrite motor system (LF)

Suitable For Outdoors


Dimensions (W x H x D)

200 x 320 x 190 mm


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