Martin Audio C4.8T 4" Ceiling Speaker
The C4.8T is the compact member of Martin Audio's Ceiling Series, a two-way flush-mount speaker built around a 4" carbon-fibre-loaded cone and a 0.8" dome tweeter. Its very wide 180-degree conical pattern is aimed at low ceilings, where a broad spread keeps coverage even without dense speaker spacing, making it a natural fit for retail, hospitality and background-music jobs.
It carries a built-in 70V/100V line transformer with tap settings from 3W to 25W, plus a 16-ohm low-impedance option, so it drops straight into a distributed system. It handles 40W AES (160W peak) and reaches 106dB peak, with a 178mm cut-out that suits standard ceiling tiles. Response runs 100Hz-20kHz.
| Drivers | 4" (100mm) carbon-fibre cone + 0.8" (19mm) dome tweeter |
|---|---|
| Frequency Response | 100Hz-20kHz +/- 3dB |
| Power Handling | 40W AES, 160W peak |
| Transformer Taps | 100V: 25/12.5/6W; 70V: 25/12.5/6/3W; plus 16 ohm |
| Dispersion | 180 deg conical to 10kHz |
| Max SPL | 100dB continuous, 106dB peak |
| Cut-out | 178mm (7.01") |
| Dimensions | 205mm dia x 131mm deep, 2.6 kg |









