Optimal Audio Cuboid 3TX


3″ Full-Range Loudspeaker, 100V/Low Impedance

  • 8 ohm or 70/100V line operation
  • 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



The Optimal Audio Cuboid 3TX is a compact, full-range, two-way passive loudspeaker, delivers exceptional audio quality. It’s perfect for distributed applications requiring high-quality background music and speech reproduction.

Its sleek design, coupled with the included mounting hardware, allows for easy installation in either portrait or landscape orientation. An available weatherproof terminal cover enhances its outdoor usability, elevating its rating to IP54.

The Optimal Audio Cuboid 3TX is equipped with a 3.5” low-frequency driver and a 0.5” PEI dome high-frequency driver, paired with a shallow waveguide for consistent high-frequency distribution.

The Cuboid 3TX offers flexibility with a series of 70 or 100V taps or low impedance operation, selectable via a rotary switch on the cabinet’s rear.

For superior bass performance, the Cuboid 3TX can be paired with the Sub 10. A SmartAmp or powered Zone can provide amplification, optimal sound settings, and limiters to safeguard the drivers during high-volume playback.

Integration with Zone and WebApp simplifies system setup and user control. This can be further enhanced with ZonePad wall controllers for an intuitive user experience.


Colour Options

Black, White

Maximum SPL


Watts (Peak)

120 W


100 V Line, 8 ohms


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

Suitable For Outdoors


Dimensions (W x H x D)

120 x 190 x 118 mm


Product Sheet





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