Optimal Audio

Optimal Audio Cuboid 3

Two-Way Passive

Full-Range 3" Loudspeaker

The Optimal Audio Cuboid 3 is a compact, full-range passive loudspeaker designed for clear and detailed sound in small commercial spaces. Ideal for retail, hospitality, and office environments, it offers discreet installation, flexible mounting, and reliable performance for both background music and speech. 

Cuboid 3
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Technical Specifications

TYPE
Two-way, full range, passive 3” loudspeaker
FREQUENCY RESPONSE (when used with preset)
125Hz - 20kHz +/-3dB, -10dB @ 80Hz
DRIVERS
LF: 3.5”(90mm) coated paper, ferrite motor system. HF: 0.5” (12.5mm) PEI Diaphragm neodymium motor system
IP RATING
IP54 when used with accessory terminal cover
RATED POWER
30 W (AES) 120W (peak)
NOMINAL IMPEDANCE
SENSITIVITY (1W/1m)
84dB
MAXIMUM SPL @1m
98dB (cont) 104dB (peak)
CROSSOVER
3kHz
DISPERSION (-6dB)
130°H x 120°V
ENCLOSURE
ABS
FINISH
Paint
PROTECTIVE GRILLE
Painted Aluminium
CONNECTORS
4 pin Euroblock
PIN CONNECTIONS (INPUT)
Positive and negative in with link out terminals
FITTINGS
M4 mounting points for wall bracket
DIMENSIONS
(W)120mm x (H)190mm x (D)118mm (W)4.7” x (H)7.5” x (D)4.7”
WEIGHT
1.26kg (2.8lb)
RECOMMENDED SUB
Sub 10
RECOMMENDED AMP
Zone, SmartAmp

Cuboid 3 is a full range, two way, passive 3” loudspeaker designed to give exceptional sound quality in a very small form factor, for distributed applications with high quality background music and speech reproduction.

With its attractive design and included mounting hardware, Cuboid 3 can be fixed in either portrait or landscape orientation for simple and flexible installation. A weatherproof terminal cover is available for outdoor use, bringing the rating to IP54.

Cuboid 3 features a 3.5” low frequency driver and a 0.5” PEI dome high frequency driver mated to a shallow wave guide for consistent HF distribution. 

For enhanced bass performance, Cuboid 3 can be teamed with Sub 10, and a SmartAmp or powered Zone will provide amplification, optimal sound performance and loudspeaker protection via engineered presets. When coupled with a Zone and WebApp, system set up and end user control is simple and intuitive, and can be further supplemented by ZonePad wall controllers.

When teamed with Zone and WebApp, system set up and end user control is easy, and can be further supplemented by Zonepad wall controllers.

  • Discreet size, high performance
  • Portrait or landscape mounting options
  • Wall bracket included
  • Max SPL 98dB (continuous) 104dB (peak)
  • 130° horizontal x 120° vertical coverage
  • IP54 for outdoor use with accessory terminal cover


TYPETwo-way, full range, passive 3” loudspeaker
FREQUENCY RESPONSE (when used with preset)125Hz - 20kHz +/-3dB, -10dB @ 80Hz
DRIVERSLF: 3.5”(90mm) coated paper, ferrite motor system. HF: 0.5” (12.5mm) PEI Diaphragm neodymium motor system
IP RATINGIP54 when used with accessory terminal cover
RATED POWER30 W (AES) 120W (peak)
NOMINAL IMPEDANCE
SENSITIVITY (1W/1m)84dB
MAXIMUM SPL @1m98dB (cont) 104dB (peak)
CROSSOVER3kHz
DISPERSION (-6dB) 130°H x 120°V
ENCLOSUREABS
FINISHPaint
PROTECTIVE GRILLEPainted Aluminium
CONNECTORS4 pin Euroblock
PIN CONNECTIONS (INPUT)Positive and negative in with link out terminals
FITTINGSM4 mounting points for wall bracket
DIMENSIONS(W)120mm x (H)190mm x (D)118mm (W)4.7” x (H)7.5” x (D)4.7”
WEIGHT1.26kg (2.8lb)
RECOMMENDED SUBSub 10
RECOMMENDED AMPZone, SmartAmp

About Penguin Media Solutions

Penguin Media Solutions is a professional audio, video, and lighting design, installation, and maintenance company based in Brighton, UK. As an authorised Martin Audio dealer, we provide high-performance AV systems for commercial venues, hospitality, and event spaces across Brighton, London, and South-East England.

The Institute of Sound, Communications & Visual Engineers | ISCVE
Restaurant & Bar Design Awards Winner

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