Features & Applications
Features
- 4-inch two-way ceiling speaker
- Rated power: 15W (AES) 30W (Peak)
- Coverage: 150˚ conical
- 70 V taps: 8,4,2,1,0.5W
- 100 V taps: 8,4,2,1W
- Steel back can and integrated fixing system
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Applications
- Restaurants, cafés and bars
- Hotels and hospitality spaces
- Retail and commercial installations
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Detailed Description Up 4S
Up 4S provides a two-way ceiling loudspeaker in a shallow steel back can. A 4-inch polypropylene LF driver works with a 0.7-inch silk-dome tweeter, producing a 150° conical coverage pattern. The shallow enclosure accommodates installations with restricted ceiling space.

The speaker is rated at 15 W AES and can run at 8 Ω or on a 70 V or 100 V line. A rotary tap selector behind the grille sets the distributed-line connection. With the stated preset, its published frequency response is 110 Hz–18 kHz within ±3 dB.
Integrated mounting hardware supports ceiling installation, with the opening and depth specified in the technical table. Optional Grille 1 gives a bezel-less finish, and Pendant 1 supports suspended mounting. Use the appropriate amplifier preset and the recommended 85 Hz high-pass filter for system configuration.
Explore the Optimal Audio range at B-Star. Technical reference: Up 4S datasheet and the Optimal Audio brochure.
Technical Specifications Up 4S
ACOUSTICS
|
| TYPE |
Two-way, full range, passive, ceiling speaker |
| FREQUENCY RESPONSE (WITH PRESET) |
110Hz – 18kHz ± 3dB -10dB @ 85Hz |
| DRIVERS |
LF: 4” (105mm), Polypropylene injection moulded HF: 0.7” (20mm) Silk Dome |
| RATED POWER |
15W (AES) 30W (Peak) |
| NOMINAL IMPEDANCE |
8Ω |
| SENSITIVITY (1 W / 1 m) |
86dB |
| MAXIMUM SPL |
98dB (cont), 101dB (peak) |
| CROSSOVER |
3.5kHz passive |
| RECOMMENDED HIGH-PASS FILTER |
24dB/octave @ 85Hz |
| DISPERSION (-6DB) |
150˚ conical |
TRANSFORMER
|
| TRANSFORMER TAPS @ 70V |
8,4,2,1,0.5W |
| TRANSFORMER TAPS @ 100V |
8,4,2,1W |
CONSTRUCTION & INSTALLATION
|
| BACK CAN |
Zinc-plated Steel |
| BAFFLE |
ABS |
| PROTECTIVE GRILLE |
Perforated steel with cloth backing |
| FIRE RATING |
UL94-V0 |
| FITTINGS |
C-ring support backing plate |
CONNECTIONS
|
| CONNECTORS |
4 Pin Euroblock with link out |
DIMENSIONS & WEIGHT
|
| DIMENSIONS (INC. GRILLE) |
(Ø) 202mm x (D) 144mm |
| CUT-OUT DIAMETER |
178mm (7.01”) |
| WEIGHT |
2.2kg (4.9lbs) |
ACCESSORIES & SYSTEM MATCHING
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| 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 |
Zone 4P, Zone 8P or SmartAmp series |
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