Optimal Audio Cuboid 15
Two-Way Passive
Full-Range 15" loudspeaker
The Optimal Audio Cuboid 15 is a flagship high-output full-range passive loudspeaker, designed to deliver powerful, room-filling sound in large commercial and live environments. Ideal for bars, event spaces, and high-energy venues, it offers exceptional low-frequency performance, wide coverage, and reliable operation for demanding audio applications.
Description
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.
For enhanced bass performance, Cuboid 15 can be teamed with Sub 15.
When teamed with Zone and WebApp, system set up and end user control is straight forward, and can be further supplemented by ZonePad wall controllers.
Cuboid 15 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
Applications for the Cuboid 15
Resources & Downloads
Data sheets, manuals and resources for the Cuboid 15
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Quick Specs
- 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/1.7” (44mm) voice coil, polyimide dome compression driver
- RATED POWER
- 500W (AES) 2000W (peak)
- NOMINAL IMPEDANCE
- 8Ω
Technical 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/1.7” (44mm) voice coil, polyimide dome compression driver
- RATED POWER
- 500W (AES) 2000W (peak)
- NOMINAL IMPEDANCE
- 8Ω
- 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
- 1x NL4, 1x 4 pin Euroblock
- PIN CONNECTIONS
- NL4 Input only 1+/1-, 4-pin Euroblock with +/- for input and +/- for link connections
- 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)
- Wall Bracket C, U Bracket D, M8 Eye Bolt
- RECOMMENDED SUB
- Sub 15
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.
For enhanced bass performance, Cuboid 15 can be teamed with Sub 15.
When teamed with Zone and WebApp, system set up and end user control is straight forward, and can be further supplemented by ZonePad wall controllers.
- 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
| 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/1.7” (44mm) voice coil, polyimide dome compression driver |
| RATED POWER | 500W (AES) 2000W (peak) |
| NOMINAL IMPEDANCE | 8Ω |
| 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 | 1x NL4, 1x 4 pin Euroblock |
| PIN CONNECTIONS | NL4 Input only 1+/1-, 4-pin Euroblock with +/- for input and +/- for link connections |
| 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) | Wall Bracket C, U Bracket D, M8 Eye Bolt |
| RECOMMENDED SUB | Sub 15 |
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.
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