The Audac WS624D is a professional-grade 2‑way in-wall/in-ceiling loudspeaker designed for commercial and high‑end installation environments. Ideal for hotels, restaurants, corporate offices, retail, public buildings and hospitality venues, it delivers high‑fidelity speech and background music from a discreet, flush-mounted form factor. The WS624D is targeted at installers, system integrators and audio‑enthusiasts seeking reliable, long-lasting performance with flexible wiring in low‑impedance systems.
The WS624D features an injection‑moulded ABS housing providing robust structural integrity with resistance to moisture and impact. Its front is fitted with a solid powder‑coated aluminium grille, which is both durable and fully paintable to match interior finishes. The low‑profile 85 mm built‑in depth and lightweight (<1.32 kg) design ensure ease of mounting in both walls and ceilings. Installer‑friendly engineering -- including a foam inlay and cut‑out template -- supports fast and stable installation over extended periods.
| Specification | Details |
|---|---|
| Power Source | Passive (Amplifier required) |
| Voltage / Impedance | 16 Ω (low‑impedance version WS624D/W) |
| Drivers | 51/4″ woofer + 1″ dome tweeter |
| Sensitivity | 92 dB (1 W/1 m) |
| Max SPL | 107 dB |
| Frequency Response (±3 dB) | 60 Hz-20 kHz |
| Range (-10 dB) | 50 Hz-20 kHz |
| Dispersion | 100 degrees horizontal × 100 degrees vertical |
| Dimensions (W × H × D) | 280 × 192 × 90 mm |
| Cut‑out Dimensions | 245 × 155 mm |
| Built‑in Depth | 85 mm |
| Weight | 1.31 kg |
| Construction | ABS housing, aluminium grille |
| Additional Features | Foam inlay, cut‑out template, paintable grille |
In real-world use, the WS624D delivers clear and intelligible sound even at lower power levels, making it ideal for voice paging and background music in medium-sized rooms. Its high sensitivity (92 dB) ensures good output with modest amplification, and the wide (100 degrees) dispersion helps avoid hotspots. The shallow build makes it highly versatile for retrofit and new build. Moisture‑resistant treatment allows installation in bathrooms or covered exteriors with confidence.
Because of its 16 Ω impedance, up to four units can be wired in parallel on a 4 Ω amplifier channel--especially useful in distributed sound installations without needing 100 V transformers.
