Optimal Audio Cuboid 3


Full Range Passive 3″ Loudspeaker

  • Compact, powerful performance
  • Mount portrait/landscape with flexibility
  • Max SPL: 98dB continuous, 104dB peak
  • Wide 130° x 120° coverage angle
  • IP54 rated, suitable for outdoors
  • Wall bracket included for installation
  • *Priced per speaker



Optimal Audio Cuboid 3 represents a compact yet powerful addition to the audio landscape, boasting a comprehensive range and a two-way passive design. Tailored to excel in distributed settings requiring top-tier sound reproduction for both background music and speech. Its compact dimensions belie its exceptional performance.

Equipped with versatile mounting hardware and a sleek design, Cuboid 3 offers the flexibility to be installed in either portrait or landscape orientation, ensuring seamless integration into any environment. Additionally, an optional weatherproof terminal cover extends its utility for outdoor applications, achieving an IP54 rating for added durability.

The heart of Optimal Audio Cuboid 3 comprises a 3.5-inch low-frequency driver paired with a 0.5-inch PEI dome high-frequency driver, seamlessly integrated with a shallow waveguide for uniform distribution of high frequencies.

To further elevate its bass capabilities, Optimal Audio Cuboid 3 can be combined with the Sub 10. The inclusion of a SmartAmp or powered Zone ensures optimal amplification and sound performance, complete with preset configurations for speaker protection. Integration with a Zone and WebApp streamlines system setup and user control, offering intuitive management that can be supplemented by ZonePad wall controllers for added convenience.


Colour Options

Black, White

Watts (Peak)

120 W


8 Ohms


1x 0.5” PEI Diaphragm neodymium (HF), 1x 3.5”coated paper, ferrite motor system (LF)

Dimensions (W x H x D)

120 x 190 x 118 mm


Product Sheet





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