Rated 4.9 (120 reviews)
The Optimal Audio Up 4S is a low-profile two-way ceiling speaker with a shallow steel backcan, designed for installations where ceiling void depth is limited. Its 4-inch LF driver and 0.7-inch silk dome tweeter deliver two-way audio quality in a form factor that fits where standard-depth models cannot, making it ideal for refurbishment projects and buildings with restricted plenum space.
4″ (105mm)
LF Driver · Low frequency
0.7″ (20mm)
HF Driver · Silk dome
8W
Power Handling · 100V line
150°
Coverage · Conical
Features
Shallow steel backcan for restricted ceiling voids
Two-way design with 0.7-inch silk dome tweeter for clear high-frequency detail
150° conical coverage, widest dispersion in the Up range
70V and 100V transformer taps plus low-impedance operation
Low-profile form factor ideal for refurbishment projects
Steel backcan provides fire rating and acoustic isolation
White finish for unobtrusive ceiling integration
Specifications
| Model | Up 4S |
| SKU | UP4S-W |
| Type | Two-way low-profile ceiling speaker |
| LF Driver | 4″ (105mm) |
| HF Driver | 0.7″ (20mm) silk dome tweeter |
| Power Handling | 8W |
| Line Voltage | 70V / 100V + Low-Z |
| Coverage | 150° conical |
| Backcan | Shallow steel |
