Cuboid 15
Two-way, full range, passive, 15" loudspeaker
Features
- Wooden cabinet
- Portrait or landscape mounting options
- Rotatable high-frequency horn
- 58Hz – 18kHz frequency response ±3dB
- Maximum SPL 126dB (continuous), 132dB (peak)
- 80° horizontal x 50° vertical coverage
Bars/Restaurants
Wedding Venues
Hotels
Education Facilities
Houses of Worship
Fitness Studios
Cuboid 15 is a full range, two-way, passive, 15” loudspeaker designed to perform. For any applications requiring big output, it effortlessly delivers rich and detailed sound with extra punch and precision.
With its wooden cabinet, steel grille and optional mounting hardware the professionally presented Cuboid 15 can be fixed in either portrait or landscape mode for a flexible, simple installation.
Cuboid 15 features a 15” (380mm) low frequency (LF) driver for extra bass and midband with a 1″ (25mm) exit high frequency (HF) compression driver for clarity of vocal and high frequency projection. The HF section delivers consistent coverage in either plane from a user-rotatable horn.
Specifications
| TYPE | Two-way, full range, passive loudspeaker |
| FREQUENCY RESPONSE (with preset) |
58Hz – 18kHz ± 3dB -10dB @ 40Hz |
| DRIVERS |
LF: 15” (380mm), ferrite motor system HF: 1” (25mm) exit/1.75” (44mm) voice coil, polymide dome compression driver |
| RATED POWER | 500W (AES) 2000W (Peak) |
| NOMINAL IMPEDANCE | 8 Ohms |
| SENSITIVITY (1W/1m) | 99dB |
| MAXIMUM SPL | 126dB (cont), 132dB (peak) |
| CROSSOVER | 2.3kHz passive |
| DISPERSION (-6dB) | 80˚ H x 50˚ V (user-rotatable) |
| ENCLOSURE | Trapezoid wooden cabinet |
| FINISH | Black textured paint |
| PROTECTIVE GRILLE | Black perforated steel with scrim cloth backing |
| CONNECTORS | 2x NL4 type |
| PIN CONNECTIONS (INPUT) | 1+/1- |
| FITTINGS | 19 x M8, inset bolts |
| DIMENSIONS |
(W) 426.5mm x (H) 691.5mm x (D) 416mm ( W) 16.79” x (H) 27.22” x (D) 16.38” |
| WEIGHT | 28kg (61.73lbs) |
Accessories
(available separately)
Subwoofer
Optimal Audio Cuboid 15 FAQs
The Cuboid 15 is a full-range, two-way passive loudspeaker boasting a 15-inch woofer. It’s designed to deliver exceptional sound quality and powerful audio output in large-scale distributed audio applications. This makes it ideal for venues requiring high-fidelity background music, clear speech reproduction, and effective sound projection over long distances.
- Powerful and rich sound: Delivers clear and detailed audio with a maximum SPL (Sound Pressure Level) of 128dB (continuous) and 134dB (peak), making it suitable for large spaces with potentially high background noise.
- Wide sound dispersion: Offers a 45° horizontal and 75° vertical coverage angle, ensuring effective sound distribution across extensive areas.
- Steel grille and optional mounting hardware: The Cuboid 15 features a professional-looking steel grille and comes with optional mounting hardware for both portrait and landscape installations, providing flexibility for various placements.
- Enhanced bass performance (optional): For situations requiring extra low-end power, the Cuboid 15 can be paired with Sub 15 subwoofers from Optimal Audio.
Yes, the Cuboid 15 is a passive speaker and requires a separate amplifier to function. Optimal Audio offers amplifiers like the Amp series designed to work seamlessly with their Cuboid speaker range. The amplifier should have a compatible impedance rating (typically 8 ohms) and sufficient power output to drive the Cuboid 15 speakers effectively.
Due to its powerful sound, wide coverage, and professional design, the Cuboid 15 is suitable for various large-scale applications like:
- Auditoriums, conference centres, and convention halls (speech reinforcement and music)
- Large event venues (concert halls, sports facilities)
- Places of worship (church music and announcements)
- Warehouses and factories (background music and announcements over ambient noise)
- Large transportation hubs (public announcements and background music in stations or terminals)
