
Full-range, open-backed
4” ceiling speaker
The Optimal Audio Up 4O is a cost-effective open-backed ceiling speaker, designed for background music and speech in commercial environments where discreet aesthetics and affordability are essential. Ideal for retail, offices, hospitality, and light-use dining spaces, it delivers reliable audio performance for everyday applications. Its open-back design allows for easy installation in ceilings with adequate cavity depth, making it a practical solution for simple, scalable audio systems.


Up 4O is a discreet 4” ceiling speaker delivering consistent coverage and crisp, clear sound to a wide range of cost conscious, commercial environments from hotels and concourses to retail outlets, bars and restaurants.
Up 4O is supplied without a back can for ceilings with a minimum cavity depth, while an integral fixing system is included to achieve a simple and clean installation. The steel perforated grille is finished in neutral white.
With the addition of the Grille 1 accessory, Up 4O can be easily enhanced with a bezel-less grille appearance and is available in both black and white, helping to blend into any architectural environment.
Up 4O features a 4” (105mm) driver which is ideal for both music and speech reproduction. A 130° conical coverage pattern ensures the system is delivering sound where it needs to go.
Each Up 4O has been specifically designed to run on 70 or 100 volt line systems via a series of transformer taps.
A SmartAmp or powered Zone will provide amplification, optimal sound performance and loudspeaker protection via onboard presets. When combined with Zone and WebApp, system set up and end user control is simple and intuitive, and can be further augmented by ZonePad wall controllers.
Data sheets, manuals and resources for the Up 4O

Our AV experts are ready to help you find the perfect solution for your project.
Up 4O is a discreet 4” ceiling speaker delivering consistent coverage and crisp, clear sound to a wide range of cost conscious, commercial environments from hotels and concourses to retail outlets, bars and restaurants.
Up 4O is supplied without a back can for ceilings with a minimum cavity depth, while an integral fixing system is included to achieve a simple and clean installation. The steel perforated grille is finished in neutral white.
With the addition of the Grille 1 accessory, Up 4O can be easily enhanced with a bezel-less grille appearance and is available in both black and white, helping to blend into any architectural environment.
Up 4O features a 4” (105mm) driver which is ideal for both music and speech reproduction. A 130° conical coverage pattern ensures the system is delivering sound where it needs to go.
Each Up 4O has been specifically designed to run on 70 or 100 volt line systems via a series of transformer taps.
A SmartAmp or powered Zone will provide amplification, optimal sound performance and loudspeaker protection via onboard presets. When combined with Zone and WebApp, system set up and end user control is simple and intuitive, and can be further augmented by ZonePad wall controllers.
| TYPE | Full range, passive, ceiling speaker |
| FREQUENCY RESPONSE (with preset) | 87Hz - 15kHz ± 3dB -10dB @ 60Hz |
| DRIVERS | 4” (105mm), Coated paper |
| RATED POWER (AES) | 10W |
| NOMINAL IMPEDANCE | Tap Dependent |
| SENSITIVITY (1W/1m) | 93dB |
| MAXIMUM SPL | 100dB (cont) |
| RECOMMENDED HIGH-PASS FILTER | 24dB/Octave @ 80Hz |
| TRANSFORMER TAPS @ 70V | 6, 3, 1.5, 0.75W |
| TRANSFORMER TAPS @ 100V | 6, 3, 1.5W |
| DISPERSION (-6dB) | 130˚ conical |
| BAFFLE | ABS |
| PROTECTIVE GRILLE | Perforated steel with cloth backing |
| FIRE RATING | UL94-V0 |
| CONNECTORS | Bare wires |
| FITTINGS | C-ring support backing plate |
| DIMENSIONS (inc. Grille) | (Ø) 202mm x (D) 117mm (Ø) 7.95” x (D) 4.62” |
| CUT-OUT DIAMETER | 178mm (7.01”) |
| WEIGHT | 1.3kg (2.9lbs) |
| INCLUDED ACCESSORIES | 2 tile support rails (for 2 ft or 600 mm tile spans), cutout template, paint shield, removable locking multi-pin connector |
| RECOMMENDED SUB | Sub 10 |
| RECOMMENDED AMPLIFIER | SmartAmp series |
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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