The Optimal Audio Cuboid 3 is a compact two-way passive loudspeaker designed for small-to-medium commercial installations. With a 3.5-inch low-frequency driver and 0.5-inch PEI dome tweeter delivering 30W programme power, it suits background music and speech reinforcement in retail, hospitality, and corporate environments. Also available in black.
30W
Power Handling · Programme
3.5″
LF Driver · Low Frequency
0.5″
HF Driver · PEI Dome
IP54
Ingress Protection · With optional cover
Features
3.5″ LF driver with 0.5″ PEI dome HF for clear two-way reproduction
Portrait or landscape mounting orientation
Mounting hardware included in the box
IP54-rated with optional outdoor connector cover (CIPKIT)
Compact enclosure suits discreet installation
Compatible with Optimal Audio SmartAmp DSP-optimised amplification
Works with Zone controllers, ZonePad wall panels, and WebApp
White finish blends with light interiors and ceilings
NoteThis is the low-impedance passive version. For 70V/100V distributed audio systems, see the Cuboid 3TX variant. The optional CIPKIT connector cover is required to achieve the full IP54 rating for outdoor or exposed installations.
Specifications
| Model | Cuboid 3 White |
| SKU | CUBOID3-W |
| Speaker Type | Two-Way Passive |
| LF Driver | 3.5″ |
| HF Driver | 0.5″ PEI Dome |
| Power Handling | 30W |
| Ingress Protection | IP54 (with optional connector cover) |
| Mounting | Portrait / Landscape |
| Colour | White |
| Mounting Hardware | Included |





